Fires burn on a hill in Livermore, California, on Thursday, August 20. California has been battling numerous wildfires as its historic drought reaches a fourth year.
The charred remains of a property is seen in Livermore on August 20.
A firefighter climbs on the side of a hill while putting out hot spots in Livermore on August 20.
Firefighter Mike Martel walks through smoke while working to clean up after a weekend fire that ravaged the Montebello Hills area near Los Angeles on Monday, August 17.
Firefighters hose down the smoldering ruins of a building that was burned by the Warm Fire north of Castaic, California, on Sunday, August 16.
A plane drops fire retardant on the Cabin Fire north of Asuza, California, on Saturday, August 15.
A crew descends a scorched mountainside in the Angeles National Forest on August 15.