Will the dangerous heat building in Northeast last into August?

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Northeast Regional Weather Forecast

A heat wave will build, then recede in the East this week with the most humid air focused on the Interstate-95 corridor.

The heat may be second only to that of just a little over a week ago, spanning July 19-21.

The combination of 85-95 F air, high humidity, light winds and intense sunshine will push AccuWeather RealFeel® Temperatures to the triple digits in many locations of the I-95 corridor and the Ohio Valley.

In much of the Northeast, the peak of the heat and humidity will be on Wednesday.

These conditions will make it risky for extended, strenuous physical activity outdoors and can pose a danger for the elderly and those with respiratory problems.

See photos from the recent heat waves:

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East coast heatwave
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Will the dangerous heat building in Northeast last into August?
NEW YORK, NY - AUGUST 17: People relax on a hot afternoon at the Astoria Pool in the borough of Queens on August 17, 2015 in New York City. The main pool, the biggest in New York City and administered by the New York City Department of Parks and Recreation, sees over 3,000 people on a typical summer weekday. New York city is in the middle of a heat wave, with temperatures in the high nineties and with a heat factor making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - AUGUST 20: A woman uses a sun umbrella along the boardwalk at Brighton Beach in Brooklyn on August 20, 2015 in New York City. The National Oceanic and Atmospheric Administration (NOAA) announced on Thursday that July was the planet's warmest month on record. July's average temperature was 61.86 degrees Fahrenheit, beating the previous global mark set in 1998 and 2010 by about one-seventh of a degree. NOAA began keeping records in1880. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 21: A man stands in the water on a sultry morning at Coney Island in Brooklyn on July 21, 2015 in New York City. Despite an overcast sky, thousands of New Yorkers headed to area beaches to cool off from the heat and humidity. The hot weather is expected to break tomorrow with temperatures expected only in the 80's. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - AUGUST 17: A child waits to get into the Astoria Pool in the borough of Queens on August 17, 2015 in New York City. The main pool, the biggest in New York City and administered by the New York City Department of Parks and Recreation, sees over 3,000 people on a typical summer weekday. New York city is in the middle of a heat wave, with temperatures in the high nineties and with a heat factor making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - AUGUST 17: People enjoy a hot afternoon at the Astoria Pool in the borough of Queens on August 17, 2015 in New York City. The main pool, the biggest in New York City and administered by the New York City Department of Parks and Recreation, sees over 3,000 people on a typical summer weekday. New York city is in the middle of a heat wave, with temperatures in the high nineties and with a heat factor making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 21: Life guards do their daily exercises on a sultry morning at Coney Island in Brooklyn on July 21, 2015 in New York City. Despite an overcast sky, thousands of New Yorkers headed to area beaches to cool off from the heat and humidity. The hot weather is expected to break tomorrow with temperatures expected only in the 80's. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 28: A woman sits in a line for ice cream along the East River in Brooklyn on a sweltering hot afternoon on July 28, 2015 in New York City. With temperatures in the 90's and the heat index feeling over 100 degrees, New Yorkers of all ages have been flocking to pools, beaches and air conditioned rooms to try and stay cool. More hot and humid days are forecast for the remainder of the week. (Photo by Spencer Platt/Getty Images)
People enjoy a warm day at the Astoria Park Pool in New York on August 16, 2015. At 330 feet in length, the Astoria Park Pool is the largest in New York City and one of the largest swimming facilities in the United States. AFP PHOTO / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
NEW YORK, NY - JULY 21: A man looks out at the Verrazano Bridge from a pedestrian promanade on a sultry morning in Brooklyn on July 21, 2015 in New York City. Despite an overcast sky, thousands of New Yorkers headed to area Parks and beaches to cool off from the heat and humidity. The hot weather is expected to break tomorrow with temperatures expected only in the 80's. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - AUGUST 20: A woman cools off in the shade at Brighton Beach in Brooklyn on August 20, 2015 in New York City. The National Oceanic and Atmospheric Administration (NOAA) announced on Thursday that July was the planet's warmest month on record. July's average temperature was 61.86 degrees Fahrenheit, beating the previous global mark set in 1998 and 2010 by about one-seventh of a degree. NOAA began keeping records in1880. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - AUGUST 20: A man who goes by Ricky Obama tries to keep cool in the heat at Brighton Beach in Brooklyn on August 20, 2015 in New York City. The National Oceanic and Atmospheric Administration (NOAA) announced on Thursday that July was the planet's warmest month on record. July's average temperature was 61.86 degrees Fahrenheit, beating the previous global mark set in 1998 and 2010 by about one-seventh of a degree. NOAA began keeping records in1880. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - AUGUST 20: Empty water containers are viewed in the trash at Brighton Beach in Brooklyn on August 20, 2015 in New York City. The National Oceanic and Atmospheric Administration (NOAA) announced on Thursday that July was the planet's warmest month on record. July's average temperature was 61.86 degrees Fahrenheit, beating the previous global mark set in 1998 and 2010 by about one-seventh of a degree. NOAA began keeping records in1880. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - AUGUST 20: A man uses a sun umbrella along the boardwalk at Brighton Beach in Brooklyn on August 20, 2015 in New York City. The National Oceanic and Atmospheric Administration (NOAA) announced on Thursday that July was the planet's warmest month on record. July's average temperature was 61.86 degrees Fahrenheit, beating the previous global mark set in 1998 and 2010 by about one-seventh of a degree. NOAA began keeping records in1880. (Photo by Spencer Platt/Getty Images)
Beathau Wazaninka, right, sits next to her daughter Ariella as she fans herself at the Marcy Avenue subway stop during a hot weather advisory, Monday July 20, 2015 in New York. Amid today's scorching weather, the state environmental department has issued an air quality health advisory for the New York City area until 10 p.m. (AP Photo/Bryan R. Smith)
NEW YORK, NY - JULY 20: Bottles of water sit for sale at a street vendor on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: People line-up for ice cream in Manhattan on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: A woman holds an umbrella on a Manhattan street on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: A woman carries a tired child along a Manhattan street on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: People sit on the steps of the James A. Farley Post Office Building on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: People wear shorts and other light clothing as they walk on a Manhattan street on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: People line-up for ice cream in Manhattan on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: People rest in the shade along a Manhattan street on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: A woman holds a sun umbrella in Manhattan on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
NEW YORK, NY - JULY 20: A woman holds an umbrella on a Manhattan street on one of the hottest days of the summer on July 20, 2015 in New York City. More than 20,000 homes and businesses in and around New York City have lost power as the electric network has been stressed due to the intense heat. New York and much of the East Coast has experienced temperatures in 90's for the past few days with the humidity making it feel over 100 degrees. (Photo by Spencer Platt/Getty Images)
Children play in the Salmon Street Springs fountain in Portland, Ore., Wednesday, July 1, 2015. A heat advisory is in effect for Portland from noon Wednesday to 8 p.m. Thursday, according to the national weather service. (AP Photo/Don Ryan)
Children play in the Salmon Street Springs fountain in Portland, Ore., Wednesday, July 1, 2015. A heat advisory is in effect for Portland from noon Wednesday to 8 p.m. Thursday, according to the national weather service. (AP Photo/Don Ryan)
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For some cities in the Northeast, this will not be the first heat wave of the year. A heat wave in the northern states constitutes three days in a row with temperatures hitting 90 F or higher. In part of the New York City area, this will be the second heat wave of the summer season. In Philadelphia, it will be the third. In Washington, D.C., it is the fourth with a month's worth of 90-degree days since early May.

Boston has yet to have a heat wave this year and has struggled to hit 90.

According to AccuWeather Long Range Expert Paul Pastelok, a series of fronts will gradually trim humidity and temperatures across the Midwest and into the Appalachians starting later this week and continue into the middle of August.

The first front will push across the Northeast on Thursday bringing the risk for showers and thunderstorms. Some of these storms could produce heavy rainfall from New England to Philadelphia.

The arrival of thunderstorms on Thursday could break the heat wave one-day short across the Interstate 95 Corridor from New York to Baltimore. Should the storms arrive late in the afternoon after peak heating, most areas should reach the 90-degree mark. However, if the storms arrive earlier in the afternoon, many places may fail to reach 90.

"While humidity levels will drop along the I-95 corridor, daytime temperatures are likely to still climb well into the 80s to the lower 90s after the humidity departs by Friday," Pastelok said. "The most noticeable cooling will occur from the Midwest to the Appalachians."

Less humid air moving into the coastal Northeast this weekend will allow the nights to cool a bit, especially in the suburbs.

In the South, some cooling will reach the southern Appalachians at times, but no lasting relief from hot and humid conditions is likely toward the Gulf of Mexico and Atlantic Coast.

No heat waves are likely from much of the Great Lakes to the coastal Northeast during the first couple of weeks of August.

"There can be a brief spike in temperature and humidity from the Midwest to the Northeast during the first couple of weeks of August," Pastelok said. "These spikes will tend to occur the day of or just ahead of a frontal passage."

The weather during the first part of August will still be warm enough for swimming most days along the Atlantic Seaboard, but perhaps on the cool side around the Great Lakes. High temperatures from New York City to Washington, D.C., will generally be in the 80s beyond this weekend into mid-August. High temperatures around the Great Lakes region will tend to be in the 70s to lower 80s most days during the first two weeks of August.

Ahead of each front will be a round of showers and thunderstorms, including in New England, where pockets of drought continue. Overall though, most places from the Midwest to the mid-Atlantic states will have fewer rainy days during early August, when compared to June and early July.

Pastelok stated that his team will be monitoring the potential for Gulf of Mexico and Atlantic moisture to feed up from the South during the first week of August, and it may be a concern for flooding rain along the I-95 corridor of the mid-Atlantic and Carolinas.

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