What are the current severe weather impacts and emergency response measures in Southern California following recent rainstorms?

Southern California is experiencing dangerous flooding conditions with torrential rainstorms triggering flash flood watches and mandatory evacuation orders. The situation has created dramatic incidents, including a debris flow that swept a firefighter's car into the ocean, though he fortunately escaped with minor injuries. The crisis is particularly severe in areas still recovering from last month's deadly wildfires. Mudslides have forced the closure of iconic Mulholland Drive, while thousands of residents face evacuation warnings. Areas near burn scars from the Pacific Palisades and Eaton fires remain under evacuation orders, as these previously burned zones are especially vulnerable to flooding and debris flows. Emergency officials are working to ensure public safety amid these rapidly changing and dangerous weather conditions that compound the existing wildfire recovery challenges.