Wineries at risk as wildfires rage in Northern California

The deadly wildfires in California have put the country's prized winemakers in peril, destroying or severely damaging at least four wineries and threatening numerous others.

Anxious vintners were checking on their properties Tuesday — that is, if the roads leading to them had not been blocked by fire officials.

"I was looking at maps overnight, and they were saying the fire was coming this way. The smoke is pretty thick, but there are no big plumes of smoke and no flames," said Alison Crowe, director of winemaking for Plata Wine Partners, which makes wine for Garnet Vineyards and Picket Fence Vineyards, both in Napa.

Crowe spoke to NBC News as she drove to her vineyards. "So far, so good. We're just crossing our fingers," she said.

Fire officials say the wildfires, fanned by strong winds, have killed at least 17 people and destroyed about 2,000 structures.

See the devastating images from the California wildfires:

43 PHOTOS
Wildfire damage in California's wine country
See Gallery
Wildfire damage in California's wine country
Winemaker Pierre Birebent inspects a melted wine bottle among the burned out remains of the Signorello Estate Winery in Napa, California on October 11, 2017. More than 200 fire engines and firefighting crews from around the country were being rushed to California on Wednesday to help battle infernos which have left at least 21 people dead and thousands homeless. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
Bicycles destroyed by wildfires are seen in Santa Rosa, California, on October 11, 2017. The toll from Northern California's ranging wildfires continued to grow as officials said the fires destroyed up to 2,000 structures and killed at least 17 people. / AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
A car destroyed by wildfires is seen in Santa Rosa, California, on October 11, 2017. The toll from Northern California's ranging wildfires continued to grow as officials said the fires destroyed up to 2,000 structures and killed at least 17 people. / AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
Homes destroyed by wildfires are seen in Santa Rosa, California, on October 11, 2017. The toll from Northern California's ranging wildfires continued to grow as officials said the fires destroyed up to 2,000 structures and killed at least 17 people. / AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
A car destroyed by wildfires si seen in Santa Rosa, California, on October 11, 2017. The toll from Northern California's ranging wildfires continued to grow as officials said the fires destroyed up to 2,000 structures and killed at least 17 people. / AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
SANTA ROSA, CA -OCTOBER 10: A toy car is left scorched in a neighborhood destroyed by fire near Cardinal Newman High School on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
SANTA ROSA, CA -OCTOBER 10: A man retrieves coins from the ruins of his house in a neighborhood destroyed by fire near Cardinal Newman High School on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
SANTA ROSA, CA -OCTOBER 10: A statue of Jesus praying with arms raised is seen among fire damaged buildings at Cardinal Newman High School on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
Burned wine barrels are seen at a destroyed Paradise Ridge Winery in Santa Rosa, California on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
A bubbling underground river of wine flows away from a burned Paradise Ridge Winery in Santa Rosa, California on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
Paradise Ridge Winery is seen burned to the ground in Santa Rosa, California on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
Burned wine barrels are seen at a destroyed Paradise Ridge Winery in Santa Rosa, California on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
TOPSHOT - A destroyed Journeys End Mobile Home Park is seen in Santa Rosa, California on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
Owner Rene Byck looks over remains of his Paradise Ridge Winery in Santa Rosa, California, on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
A wild turkey wanders through a burned brush in Santa Rosa, California, on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
Mike Reynolds of the housing and community services department for the city of Santa Rosa places a red-tag sign on a burned down Arby's restaurant in Santa Rosa, California on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
GLEN ELLEN, CA - OCTOBER 10: A view of the remains of multiple homes that were destroyed by the Nuns Fire on October 10, 2017 in Glen Ellen, California. Fifteen people have died in wildfires that have burned tens of thousands of acres and destroyed over 2,000 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 10: A view of the remains of a home that was destroyed by the Nuns Fire on October 10, 2017 in Glen Ellen, California. Fifteen people have died in wildfires that have burned tens of thousands of acres and destroyed over 2,000 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
The entrance to an Arby's restaurant is seen after burning down in Santa Rosa, California on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
The remains of an Arby's restaurant is seen after burning down in Santa Rosa, California, on October 10, 2017. Firefighters encouraged by weakening winds were battling 17 large wildfires on Tuesday in California which have left at least 13 people dead, thousands homeless and ravaged the state's famed wine country. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
SANTA ROSA, CA - OCTOBER 10: A neighborhood is destroyed by fire in the area of Foxtail Court, on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
SANTA ROSA, CA - OCTOBER 10: A neighborhood is destroyed by fire in the area of Foxtail Court, on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
SANTA ROSA, CA -OCTOBER 10: A neighborhood is destroyed by fire in the area of Foxtail Court, on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
SANTA ROSA, CA -OCTOBER 10: A neighborhood is destroyed by fire in the area of Foxtail Court, on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
SANTA ROSA, CA - OCTOBER 10: A man looks for something to salvage in a neighborhood destroyed by fire in the area of Foxtail Court, on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
CALIFORNIA, USA - OCTOBER 10: The remains of a damaged buildings are seen after a wildfire moved through the area in Santa Rosa and Napa Valley in California, United States on October 10, 2017 leaving at least 10 people dead and destroying homes and businesses in their path. (Photo by Tayfun Coskun/Anadolu Agency/Getty Images)
CALIFORNIA, USA - OCTOBER 10: The remains of a damaged buildings are seen after a wildfire moved through the area in Santa Rosa and Napa Valley in California, United States on October 10, 2017 leaving at least 10 people dead and destroying homes and businesses in their path. (Photo by Tayfun Coskun/Anadolu Agency/Getty Images)
CALIFORNIA, USA - OCTOBER 10: The remains of a damaged buildings are seen after a wildfire moved through the area in Santa Rosa and Napa Valley in California, United States on October 10, 2017 leaving at least 10 people dead and destroying homes and businesses in their path. (Photo by Tayfun Coskun/Anadolu Agency/Getty Images)
SANTA ROSA, CALIFORNIA - OCTOBER 9: The Estancia Apartment Homes on Old Redwood Hwy. were completely destroyed on October 9, 2017 in Santa Rosa, California. (Brian van der Brug / Los Angeles Times via Getty Images)
SANTA ROSA, CALIFORNIA - OCTOBER 9: A Fountaingrove Village homeowner surveys her destroyed home she and her husband have owned for 4 years in Santa Rosa on October 9, 2017 in Santa Rosa, California. (Brian van der Brug / Los Angeles Times via Getty Images)
SANTA ROSA, CALIFORNIA - OCTOBER 9: A police officer looks over the destruction of a home in a neighborhood off Fountaingrove Parkway near the Hilltop in Santa Rosa on October 9, 2017 in Santa Rosa, California. (Brian van der Brug / Los Angeles Times via Getty Images)
NAPA, CA - OCTOBER 09: The remains of the fire damaged Signarello Estate winery after an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Tens of thousands of acres and hundreds of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
NAPA, CA - OCTOBER 09: The remains of the fire damaged Signarello Estate winery after an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Tens of thousands of acres and hundreds of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
Resident Louis Reavis views his burned classic Corvette at his home in Napa, California on October 9, 2017, as multiple wind-driven fires continue to whip through the region. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Burned cars sit idle after an out of control wildfire moved through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: The remains of fire damaged homes after an out of control wildfire moved through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
The William Hill Estate Winery sign is seen partially burnt in Napa, California on October 9, 2017, as multiple wind-driven fires continue to whip through the region. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
NAPA, CA - OCTOBER 09: Burned out wine bottles sit on a rack at the fire damaged Signarello Estate winery after an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Tens of thousands of acres and hundreds of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
Damage from the Napa fire is seen on a destroyed goat dairy farm on October 10, 2017 in Carneros a town just outside of Napa, California. Firefighters battled wildfires in California's wine region on October 10 as the death toll rose to 15 and thousands were left homeless in neighborhoods reduced to ashes. / AFP PHOTO / Amy Osborne (Photo credit should read AMY OSBORNE/AFP/Getty Images)
Grape vines damaged by heat from wildfires are seen at a vineyard in Santa Rosa, California, on October 11, 2017. The toll from Northern California's ranging wildfires continued to grow as officials said the fires destroyed up to 2,000 structures and killed at least 17 people / AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
SANTA ROSA, CA - OCTOBER 11: Some houses burned and some did not. Aerial view of the damage caused by wildfire that destroyed the Coffey Park neighborhood on October 11, 2017 in Santa Rosa, California.(Photo by Marcus Yam / Los Angeles Times via Getty Images)
SANTA ROSA, CA - OCTOBER 11: An American hangs outside a home burned down by wildfire that destroyed the Coffey Park neighborhood on October 11, 2017 in Santa Rosa, California.(Photo by Marcus Yam / Los Angeles Times via Getty Images)
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Napa Valley Vintners, the trade association for America's premier wine region, said four wineries "suffered total or very significant losses due to the fire." At least nine others reported some damage, said the association, which cautioned that it had yet to hear from some wineries in the most vulnerable areas of the valley.

The Associated Press reported that Signorello Estate in Napa County and Paradise Ridge Winery in Sonoma County were destroyed.

Industry experts said it was too soon to assess the total damage from the fires.

Napa and Sonoma counties are home to more than 1,100 wineries in total, according to the Wine Institute, a trade group that represents the wine industry in California. The state produces about 85 percent of all U.S. wine, with the Napa and Sonoma region accounting for anywhere between 8 percent and 10 percent combined of U.S.-produced wine, the institute said.

RELATED: Sky turns orange above Disneyland

21 PHOTOS
California wildfires turn skies over Disneyland orange
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California wildfires turn skies over Disneyland orange
Not the usual blue skies over #Disneyland today...feels eerie #fire #canyonfire2 #sleepingbeautycastle #smoke #disneylandresort
It's raining ash at Disneyland . . . #dca #disney #disneycaliforniaadventure #disneyland #fire #ash #sky
@Disneyland looking surreal with #canyonfire2 burning in the distance https://t.co/gaVpOrwXw1
My thoughts are with everyone affected by the fires in Anaheim Hills right now. This photo and video were taken by me, no filter used whatsoever.
#Canyon2Fire over #CaliforniaAdventure #Disneyland #abc7eyewitness #ktla #kcal #southerncalifornia #california #disneyland #anaheim #anaheimhills #smoky #photography #photographer #iphoneography #momentsbykerry.com #californiafireseason
Fire skies as seen at #Disney #dca #california #fire https://t.co/OzS5rXcczX
#Disneyland
#Canyon2Fire over #CaliforniaAdventure #Disneyland #abc7eyewitness #ktla #kcal #southerncalifornia #california #disneyland #anaheim #anaheimhills #smoky #photography #photographer #iphoneography #momentsbykerry.com #californiafireseason
The view from Disneyland of the #anaheimhills fire. https://t.co/S7adGlzxU5
Carbon Canyon Fire creating some seriously spooky spectating at Disney’s California Adventure! 🖤🎃 #NOFILTER
The fires in West Anaheim are making the park look real creepy #Matterhorn #Disneyland
Smoky skies over #Disneyland #fire https://t.co/rLoRr1lF2G
#Canyon2Fire over #CaliforniaAdventure #Disneyland #abc7eyewitness #ktla #kcal #southerncalifornia #california #disneyland #anaheim #anaheimhills #smoky #photography #photographer #iphoneography #momentsbykerry.com #californiafireseason
Disney’s California Adventure is on fire 🔥 https://t.co/xqZ2jbSMJM
🎼"Like Fire, Hellfire" • • • • • • • • • • • #disney #disneyland #fire #dragon #lego #nofilter #picoftheday #adventure #actor #actorslife #halloween #spooky #halloweentimeatdisneyland #nature #potd #followforfollow #goodevening
Forest fires causing the sky at Disneyland and DCA to be filled with smoke. Ash raining from the sky. https://t.co/oWWZPOTnx4
A bug eyes view from Bugs land . . . #disneycaliforniaadventure #disney #disneyland #dca #fire #sky
The sky makes me feel like I'm on another planet... Thoughts and prayers go out to anybody affected by the fire in Anaheim Hills. . . . . #disneyland #starwars #pathofthejedi #tomorrowland #disneyannualpassholder #disneylandap
There's a brush fire 🔥 in the area causing a red sun ☀️hope everyone is ok. #nofilter #california #disneyland #californiaadventure
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The economic impact of that production is significant: Sonoma County alone generates $13 billion a year from its wine industry, said Karissa Kruse, president of Sonoma County Winegrowers, which aims to preserve agriculture for grape growers. And this time of year is when the grapes that produce the most expensive bottles of wine are made.

Related: Record High Temperatures Hurt California Wine Harvest

Both flames and smoke pose a danger to the vineyards, but it was still too early to determine how much of an effect they would have, said Kruse, whose own home in the Sonoma County city of Santa Rosa burned down.

"Every year, we do a battle with Mother Nature. We just didn't realize we would be in such an extreme one this year," she said.

With power and cell service spotty, winemakers used Facebook to check in on one another.

"The Napa Fire is still raging. Engine Number 7 saved our winery and house," the Fontanella Family Winery in Napa posted on its Facebook account. "We aren't out of the woods yet, we're still having flare-ups everywhere, but we are ok. Sending our prayers to our friends who haven’t been as lucky."

Related: Northern California Wildfires Claim at Least 15 Lives as More Than 100K Acres Burn

The fires come during an already brutal harvest season for California vineyards, which baked in record-high temperatures this summer. With 12 days of temperatures over 100 degrees, many winemakers saw grapes shrivel into raisins before they had a chance to use them.

But the unprecedented temperatures had passed, and winery crews were doing their final harvest pick, set to spend the next 10 or so days collecting longer-ripening grapes that would be turned into Cabernet Sauvignon, Syrah and Merlot wines when the fires began, Kruse said. About 90 percent of grapes had already been harvested, she added — good news, since the grapes were already in barrels or tanks, safe from the effects of the blaze.

62 PHOTOS
Devastating wildfires ravage California's wine country
See Gallery
Devastating wildfires ravage California's wine country
SANTA ROSA, CA - OCTOBER 09: Burned lawn chairs sit next to the swimming pool at the Journey's End Mobile Home Park on October 9, 2017 in Santa Rosa, California. Ten people have died in wildfires that have burned tens of thousands of acres and destroyed over 1,500 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Fire consumes a barn as an out of control wildfire moves through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
YOUNTVILLE, CA - OCTOBER 09: A Los Angeles County firefighter monitors approching flames near a building as an out of control wildfire moves through the area on October 9, 2017 in Yountville, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
NAPA, CA - OCTOBER 09: Burned out wine bottles sit on a rack at the fire damaged Signarello Estate winery after an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Tens of thousands of acres and hundreds of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
SONOMA, CA - OCTOBER 09: A burned out home sits next a vineyard after an out of control wildfire moved through the area on October 9, 2017 in Sonoma, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
NAPA, CA - OCTOBER 09: The remains of the fire daaged Signarello Estate winery after an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Ten people have died in wildfires that have burned tens of thousands of acres and destroyed over 1,500 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: A resident rushes to save his home as an out of control wildfire moves through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: A resident rushes to save his home as an out of control wildfire moves through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
A burned home smolders in Glen Ellen, California on October 9, 2017. Multiple wind-driven fires continue to ravage the area burning structures and causing widespread evacuations. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: The remains of fire damaged homes after an out of control wildfire moved through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Fire consumes a barn as an out of control wildfire moves through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Fire consumes a home as an out of control wildfire moves through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: The remains of fire damaged homes after an out of control wildfire moved through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: A resident rushes to save his home as an out of control wildfire moves through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Cows stand on a patch of unburned grass after an out of control wildfire moved through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Burned cars sit idle after an out of control wildfire moved through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Fire consumes a home as an out of control wildfire move through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Fire consumes a home as an out of control wildfire move through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: The remains of fire damaged homes after an out of control wildfire moved through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Flames consume a home as an out of control wildfire move through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Flames consume a home as an out of control wildfire move through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: Fire consumes a home as an out of control wildfire move through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: The remains of fire damaged homes after an out of control wildfire moved through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
An aerial photo of the devastation left behind from the North Bay wildfires north of San Francisco, California, October 9, 2017. California Highway Patrol/Golden Gate Division/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY
An aerial photo of the devastation left behind from the North Bay wildfires north of San Francisco, California, October 9, 2017. California Highway Patrol/Golden Gate Division/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY
A burned home smolders in Glen Ellen, California on October 9, 2017. Multiple wind-driven fires continue to ravage the area burning structures and causing widespread evacuations. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
A garage door is left standing in front of a smoldering home in Glen Ellen, California on October 9, 2017. Multiple wind-driven fires continue to ravage the area burning structures and causing widespread evacuations. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
A gas line spews flames at a burned out property in Glen Ellen, California on October 9, 2017. Multiple wind-driven fires continue to ravage the area burning structures and causing widespread evacuations. / AFP PHOTO / JOSH EDELSON (Photo credit should read JOSH EDELSON/AFP/Getty Images)
YOUNTVILLE, CA - OCTOBER 09: A Napa Valley public worker sprays water on a building as an out of control wildfire moves through the area on October 9, 2017 in Yountville, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
YOUNTVILLE, CA - OCTOBER 09: A Los Angeles County firefighter monitors approching flames near a building as an out of control wildfire moves through the area on October 9, 2017 in Yountville, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
NAPA, CA - OCTOBER 09: Fire burns a trailer and parking structure as an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Tens of thousands of acres and hundreds of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
NAPA, CA - OCTOBER 09: The remains of the fire damaged Signarello Estate winery after an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Tens of thousands of acres and hundreds of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
NAPA, CA - OCTOBER 09: The remains of the fire damaged Signarello Estate winery after an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Tens of thousands of acres and hundreds of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
NAPA, CA - OCTOBER 09: The remains of the fire damaged Signarello Estate winery after an out of control wildfire moved through the area on October 9, 2017 in Napa, California. Tens of thousands of acres and hundreds of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
CALIFORNIA, USA - OCTOBER 10: A view of a warning banner in San Francisco as a wildfire from the Santa Rosa and Napa Valley moves through the area in California, United States on October 10, 2017. (Photo by Tayfun Coskun/Anadolu Agency/Getty Images)
CALIFORNIA, USA - OCTOBER 10: Smoke rises as a wildfire from the Santa Rosa and Napa Valley moves through the area in California, United States on October 10, 2017. (Photo by Tayfun Coskun/Anadolu Agency/Getty Images)
CALIFORNIA, USA - OCTOBER 10: A view of a San Francisco gulf as smoke covers the sun as a wildfire from the Santa Rosa and Napa Valley moves through the area in California, United States on October 10, 2017. (Photo by Tayfun Coskun/Anadolu Agency/Getty Images)
CALIFORNIA, USA - OCTOBER 10: A view of a San Francisco gulf as smoke covers the sun as a wildfire from the Santa Rosa and Napa Valley moves through the area in California, United States on October 10, 2017. (Photo by Tayfun Coskun/Anadolu Agency/Getty Images)
SANTA ROSA, CA - OCTOBER 09: Burned out cars sit next to a building on fire in a fire ravaged neighborhood on October 9, 2017 in Santa Rosa, California. Ten people have died in wildfires that have burned tens of thousands of acres and destroyed over 1,500 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
CALIFORNIA, USA - OCTOBER 10: A view of a San Francisco gulf as smoke covers the sun as a wildfire from the Santa Rosa and Napa Valley moves through the area in California, United States on October 10, 2017. (Photo by Tayfun Coskun/Anadolu Agency/Getty Images)
SANTA ROSA, CA - OCTOBER 09: A resident goes through personal belongings in a parking lot next to a fire damaged Arby's restaurant on October 9, 2017 in Santa Rosa, California. Ten people have died in wildfires that have burned tens of thousands of acres and destroyed over 1,500 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
SANTA ROSA, CA - OCTOBER 09: Flames consume a section of the Hilton Sonoma Wine Country on October 9, 2017 in Santa Rosa, California. Ten people have died in wildfires that have burned tens of thousands of acres and destroyed over 1,500 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
SANTA ROSA, CA - OCTOBER 09: Burned out cars sit next to a building on fire in a fire ravaged neighborhood on October 9, 2017 in Santa Rosa, California. Ten people have died in wildfires that have burned tens of thousands of acres and destroyed over 1,500 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
SANTA ROSA, CA - OCTOBER 09: Smoke continues to rise from the Hilton Sonoma Wine Country on October 9, 2017 in Santa Rosa, California. Ten people have died in wildfires that have burned tens of thousands of acres and destroyed over 1,500 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
SONOMA, CA - OCTOBER 09: An out of control wildfire approaches Gundlach Bundschu winery on October 9, 2017 in Sonoma, California. Ten people have died in wildfires that have burned tens of thousands of acres and destroyed over 1,500 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
An aerial shows damage caused by wildfires in Santa Rosa, California, U.S October 11, 2017. Picture taken October 11, 2017. REUTERS/DroneBase TPX IMAGES OF THE DAY
An American flag hangs from a tree in a neighborhood destroyed by wildfire in Santa Rosa, California, U.S., October 12, 2017. REUTERS/Jim Urquhart TPX IMAGES OF THE DAY
Area residents walk through a neighborhood destroyed by wildfire in Santa Rosa, California, U.S., October 12, 2017. REUTERS/Jim Urquhart TPX IMAGES OF THE DAY
Wine stains are seen on a fermentation tank at Paradise Ridge Winery after being destroyed by the Tubbs Fire in Santa Rosa, California, U.S., October 12, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY
Pacific Gas and Electric (PG&E) trucks are seen parked on a road between homes destroyed by the Tubbs Fire in Santa Rosa, California, U.S., October 11, 2017. Picture taken October 11, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY
A wildfire is shown from the air near Atlas Road during an operation to rescue people trapped by wildfire in Napa, California, U.S., October 9, 2017. Photo taken October 9, 2017. Courtesy California Highway Patrol/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY TPX IMAGES OF THE DAY
A burnt tree stands amidst the destroyed Journey's End Mobile Home Park during the Tubbs Fire in Santa Rosa, California, U.S., October 9, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY
Smoke and flame rise from the Hilton Sonoma Wine Country during the Tubbs Fire in Santa Rosa, California, U.S., October 9, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY
An aerial view of properties destroyed by the Tubbs Fire is seen in Santa Rosa, California, U.S., October 11, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY
NAPA, CA -OCTOBER 12: Flowers mark the spot where his father died as Mike Rippey walks through the ruins of the house of 100-year-old Charles and 98-year-old Sara Rippey, who were killed in the Atlas Fire just after it began, on October 12, 2017 near Napa, California. Thousands homes have burned and two dozen people have been confirmed dead so far as numerous wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
SANTA ROSA, CA - OCTOBER 11: An aerial view of homes that were destroyed by the Tubbs Fire on October 11, 2017 in Santa Rosa, California. Twenty one people have died in wildfires that have burned tens of thousands of acres and destroyed over 3,000 homes and businesses in several Northen California counties. (Photo by Justin Sullivan/Getty Images)
SANTA ROSA, CA -OCTOBER 10: A toy car is left scorched in a neighborhood destroyed by fire near Cardinal Newman High School on October 10, 2017 in Santa Rosa, California. In one of the worst wildfires in state history, at least 1,500 homes have burned and 11 people have died as more than 14 wildfires continue to spread in eight Northern California counties. (Photo by David McNew/Getty Images)
GLEN ELLEN, CA - OCTOBER 09: A resident rushes to save his home as an out of control wildfire moves through the area on October 9, 2017 in Glen Ellen, California. Tens of thousands of acres and dozens of homes and businesses have burned in widespread wildfires that are burning in Napa and Sonoma counties. (Photo by Justin Sullivan/Getty Images)
Homeowner Phil Rush looks at the remains of his home destroyed by wildfire in Santa Rosa, California, on October 11, 2017. Rush said he and his wife and dog escaped with only their medication, a bag of dog food when flames overtook their entire neighborhood on October 9. The toll from Northern California's ranging wildfires continued to grow as officials said the fires destroyed up to 2,000 structures and killed at least 17 people. / AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
NAPA, CA -OCTOBER 11: The body of a cow that died in the Atlas Fire is seen in Soda Canyon on October 11, 2017 near Napa, California. In one of the worst wildfires in state history, more than 2,000 homes have burned and at least 21 people have been killed as more than 14 wildfires continue to spread with little containment in eight Northern California counties. (Photo by David McNew/Getty Images)
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Maureen Cottingham, the executive director of the Sonoma Valley Vintners & Growers Alliance, said smoke taint, which would give grapes still remaining on vines an unwanted smoky character, was a possibility.

"The smoke today is 20 times worse than it was yesterday," she said. "We're not sure how that's going to impact [vineyards]."

Anita Oberholster, an extension specialist in enology at the University of California, Davis, explained that smoke contains volatiles that are absorbed by a grape's skin.

"These compounds can extract into your wine," she said. "At excess levels, that would be considered smoke taint."

Wind direction, according to Crowe, would determine whether smoke "just sits over the vineyard" or if it blows over.

"You have to accumulate enough hours of severe smokiness to have it show up in the wine, so it's still uncertain where we will be on that spectrum," she said. 

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