Los Angeles and Ventura counties are included in an updated flood advisory issued by the National Weather Service on Thursday at 10:39 a.m. The advisory is in effect until 9 p.m.

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.

A monster rainstorm was drenching southern California on Thursday, with officials in Los Angeles readying for flooding and landslides in areas burned by last month's huge wildfires.