In the Los Angeles area, mud and debris covered several major roads including the Pacific Coast Highway, the 101 freeway and Mulholland Drive in the Hollywood Hills. In Malibu, an SUV carrying a Los Angeles firefighter was swept off the road and into the Pacific Ocean.

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

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.