Five zones in Los Angeles County are under evacuation orders, with 2,700 residents evacuated and 700 structures threatened by the flames, officials said. Six other zones in this county are currently under an evacuation warning, with 1,400 residents and 5,000 structures at risk, officials said.

Firefighters Friday were trying to make progress after the Canyon fire exploded to nearly 5,000 acres, forcing residents in northern Los Angeles and Ventura counties to evacuate.

Temperatures in the area are near 100 degrees and humidity as low as 15 percent. The southern part of California has seen very little rain, drying out vegetation and making it "ripe to burn," the National Weather Service (NWS) for Los Angeles warned.