Southern California was being pounded by a major storm Thursday morning, bringing evacuation warnings and fears of mudslides.

Heavy rain pounded the Los Angeles area early Thursday, bringing a threat of flooding and debris flows to spots impacted by wildfires.

Authorities issued evacuation warnings and orders for tens of thousands of Los Angeles residents on Wednesday after heavy rain created the potential for deadly mudslides in the Palisades Fire zone. CalFire urged citizens to be ready to flee at a moment’s notice should heavy rains create deadly rivers of mud and debris in the denuded hillsides.