Los Angeles County is included in an updated flash flood warning issued by the National Weather Service on Thursday at 5:15 p.m. The warning is in effect until 9 p.m. “At 5:15 p.m., Doppler radar and automated rain gauges indicated very heavy rain falling across the warned area.

As Los Angeles braces for its most powerful storm of the season, concerns of mudslides and debris flows in recently fire-hit areas have prompted evacuation warnings.