The rainfall arrives about two months after January wildfires in Southern California, including the Palisades and Eaton fires in Los Angeles County. The fires stripped brush from hillsides, leaving them more vulnerable to mud and debris flows as rainfall rates increase.

The storm is expected to dump 1 to 2 inches of rain along the coast and up to 4 inches in the valleys at rates that could cause problems. Some roads will be closed starting Wednesday.