A wildfire, dubbed the Springs Fire, expanded to 4,176 acres (16.9 square km) with only 10 percent containment in Riverside County as of Friday evening, according to the California Department of Forestry and Fire Protection (Cal Fire), Xinhua reported.
Around 260 firefighters are still battling the fire as evacuation orders were issued for some nearby communities in the area.
Another blaze, dubbed the Crown Fire, had burned 345 acres (1.4 square km) in Los Angeles County. The fire was 25 percent contained so far, according to the Cal Fire.
All evacuation orders for the Crown Fire have been lifted, but evacuation warnings remain in place for parts of the surrounding area.
The US National Weather Service issued a Wind Advisory for some areas in Southern California, warning that "moderate to strong Santa Ana winds affected much of the area" Friday.
"Significant warming is expected through Sunday as gusty Santa Ana winds continue over Los Angeles and Ventura Counties," the agency said in an area forecast discussion.