Rain in Southern California is expected to help firefighters responding to multiple wildfires, but potentially heavy rain on burned hillsides could cause toxic ash runoff.

Crews spent much of the past week removing vegetation, shoring up slopes and reinforcing roads in devastated areas of the Palisades and Eaton fires, which reduced entire neighborhoods to rubble and ash after breaking out during powerful winds Jan.

California's deadly wildfires could come to an end in the coming days when a weekend storm douses historically dry terrain, but the storm will come with the potential for a different problem: flash floods.