A massive pyrocumulus cloud forms atop a smoke plume as record heat-wave conditions stoke the Ranch 2 Fire on August 15, 2020, as seen from Azusa, California. #

A car burns while parked at a residence in Vacaville, California, during the LNU Lightning Complex Fire on August 19, 2020. #

In this long-exposure photograph, embers fly off a burning tree during the Hennessey Fire in the Spanish Flat area of Napa, California, on August 18, 2020. #

A plane drops fire retardant near homes while fighting the River Fire near Salinas, California, on August 16, 2020. #

A horse walks toward flames as the LNU Lightning Complex Fire tears through Vacaville on August 19, 2020. #

Flames set ablaze both sides of a segment of Lake Berryessa during the Hennessey Fire on August 18, 2020. #

A funnel appears in a thick plume of smoke from the Loyalton Fire, seen in Lassen County, California, on August 15, 2020. #

A Riverside firefighter climbs on top of his truck during the Lake Fire at Pine Canyon Road in the Angeles National Forest, on August 15, 2020. #

The San Francisco skyline is barely visible through smoke from wildfires on August 19, 2020, in this view from Sausalito, California. #

Planes work around the fire site in Lake Hughes on August 13, 2020. #

A sign warning people about COVID-19 is surrounded by flames during the Hennessey Fire near Lake Berryessa in Napa on August 18, 2020. #

Firefighters battle the Lake Fire on August 15, 2020, near Lake Hughes, California. #

An inmate firefighter rests during a break from battling the River Fire in Salinas, California, on August 17, 2020. #

A home burns in the Spanish Flat area of Napa, California as flames rage through on August 18, 2020. #

A palm tree and shrubs burn as flames approach a home as the Hennessey Fire continues to rage out of control near Lake Berryessa on August 18, 2020. #

Mobile homes burn at the Spanish Flat Mobile Villa as the LNU Lightning Complex Fire burns through the area on August 18, 2020, in Napa. #

Flames grow on both sides of a segment of Lake Berryessa during the Hennessey Fire on August 18, 2020. #

Embers fly from a burning tree after the LNU Lightning Complex Fire burned through the area on August 18, 2020. #

A fire truck drives through flames as the Hennessey fire continues to rage out of control near Lake Berryessa on August 18, 2020. #

Fire retardant hangs in the air after being dropped from a firefighting plane ahead of the LNU Lightning Complex Fire on August 18, 2020, in Napa. #

A firefighter watches the smoke and flames from the Ranch Fire in the hills of Azusa, California, on August 14, 2020. #

An American flag blows in the wind in front of a burning home in Vacaville, California, during the LNU Lightning Complex Fire on August 19, 2020. #