After restoring electricity on Thursday afternoon to all customers in rural areas impacted by public safety shutoffs, strong Santa Ana winds overnight forced San Diego Gas & Electric to turn off the power again.

Red Flag Warnings remain in effect through Friday evening for much of Los Angeles and Ventura Counties, the National Weather Service said.

Powerful Santa Ana winds are set to pick up again, making it challenging for firefighters to gain control of the severe wildfires in southern California. Meanwhile, a winter storm is bringing cold temperatures,