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.

A powerful storm is bearing down on California as an atmospheric river drops through the state. While the fast-moving system will affect nearly the entire state on Thursday, of high concern is Southern California as intense rains fall on the heels of devastating wildfires — downpours that could trigger damaging floods and debris flows.

As heavy rain from a large storm subsided, officials in Southern California said rock and mudslides remain a threat.

Three days of drenching rain, flooding and mudslides have forced evacuations and road closures, including a portion of the Pacific Coast Highway from Malibu and Pacific Palisades. The Pacific Palisades neighborhood of Los Angeles,