California's Skirball blaze may have been sparked by a cooking fire


California officials say one of the wildfires scorching the state was caused by human activity.

Investigators think a cooking fire at a nearby homeless encampment may have started the Skirball Fire near Los Angeles. There are currently no suspects.

The Skirball Fire has burned 422 acres so far, destroying six structures and injuring three firefighters. It is currently 85 percent contained.

But the Skirball Fire is one of the smaller fires currently ravaging the state: California's Thomas Fire has burned more than 230,000 acres so far, and is only 20 percent contained.

More on the wildfires' impact: 

14 PHOTOS
Aerial images of Ventura County, California wildfire
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Aerial images of Ventura County, California wildfire
VENTURA COUNTY, CA - DECEMBER 5: View of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: Dozens of homes destroyed in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: Dozens of homes destroyed in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: Homes burned to the ground in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: A home is fully involved in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: A home is fully involved in fire and others destroyed in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: A home is fully involved in fire and others destroyed in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: Dozens of homes destroyed in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: View of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: Dozens of homes destroyed in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
SYLMAR, CA, DECEMBER 5: Flames encroach on structures in the hills above Sylmar fire from helicopter in Los Angeles County, Calif., on Dec. 5, 2017. (Photo by Brian van der Brug / Los Angeles Times via Getty Images)
MALIBU, CA - FEBRUARY 25: LA County Fire helicopters make water drops to halt forward progress of the10 acre brush fire called the Mulholland Fire in the western Malibu hills near the Ventura County line Thursday morning as hand crews work to cut a control line around the blaze. A fire crew inmate suffered major injuries from fallng rock while battling the fire and was airlifted to UCLA Medical Center. (Al Seib / Los Angeles Times via Getty Images)
MALIBU, CA - FEBRUARY 25: LA County Fire helicopters make water drops to halt forward progress of the10 acre brush fire called the Mulholland Fire in the western Malibu hills near the Ventura County line Thursday morning as hand crews work to cut a control line around the blaze. A fire crew inmate suffered major injuries from fallng rock while battling the fire and was airlifted to UCLA Medical Center. (Al Seib / Los Angeles Times via Getty Images)
VENTURA COUNTY, CA - DECEMBER 5: Dozens of homes destroyed in view of the Thomas fire from helicopter in on Dec. 5, 2017 in Ventura County, California. (Photo by Brian van der Brug/Los Angeles Times via Getty Images)
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