As of midafternoon, rain had picked up in some areas, and Caltrans crews were working at many locations to clear debris from roads and reduce flooding.

The National Weather Service warned that rain and flooding would intensify throughout the evening until around 10 p.m., bringing the risk of major flooding, debris flows and damaging winds.

As Southern California recovers from last month’s devastating wildfires, heavy rains Thursday resulted in pockets of flooding, blocked roadways and mud piling up around recent burn scars.