Incoming heavy rain from an atmospheric river-fueled storm that slammed into the West Coast early Wednesday is threatening mudslides and debris flows in Southern California and has already prompted evacuations in the Los Angeles area.

A strong storm system moving through Los Angeles and Orange counties Thursday is bringing a heavy dose of rain over a short period of time and prompting evacuation orders, flood warnings and road closures.

Late-winter storms bringing heavy rain, evacuation order and warnings, flood warnings and road closures is in the forecast Wednesday for Los Angeles and Orange counties and is expected to douse the region for the next three days.