The storm prompted evacuation orders, as officials warned of flash floods in burn-scarred areas near the Eaton and Palisades fires and cautioned drivers to stay off the roads.

For the second time this year, Southern Californians are evacuating their homes as heavy rain threatens new destruction in places still recovering from last month’s devastating wildfires.

Debris flows brought on by the strongest atmospheric river of the season swept a car off a southern California highway and into the ocean and left roads submerged in sludge.