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.
A burn operation is seen during the Jerusalem Fire, near Lower Lake, California, on Friday, August 11.
Flames from a backfire operation burn through a grove of trees as firefighters try to head off the Rocky Fire on Monday, August 3, near Clearlake, California.
Firefighters look on as the Rocky Fire burns through trees on Sunday, August 2.