A swift debris flow swept a Los Angeles Fire Department vehicle off the Pacific Coast Highway and into the ocean as heavy rain fell across Southern California on Thursday, creating deluges of water and mud on roads at the bottom of hillsides left barren by recent wildfires.

In the Los Angeles area, the burn scars that carry the highest risk are those from the Eaton and Palisades fires from January and the Bridge Fire from the fall.

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.