“Recent research shows that debris flows almost always happen in Southern California after wildfires, and given that there are multiple wildfires and each of them is pretty large, really we’re in a situation where the next large rainfall event is almost certain to generate some sort of debris flow.”

As the heaviest parts of the storm passes through Los Angeles County, rain water continues to fill debris bains near the Eaton Fire burn scar.

What to Know A flash flood watch, indicating the potential for flooding to develop, will be in effect Thursday afternoon. Scattered showers will continue Wednesday before more intense periods of rain throughout Thursday.