A potent storm is expected to deliver significant precipitation across California on Wednesday and Thursday, soaking coastal areas and bringing up to an inch and a half of rain to urban areas including San Francisco and Los Angeles. Several feet of snow is forecast to fall in the Sierra Nevada and cause travel delays.

There is a heightened risk for urban flooding and landslides, including debris flows in areas of Los Angeles that were burned by wildfires earlier this year. A series of evacuation warnings and orders were in effect on Wednesday in areas that had been affected by the Palisades and Eaton fires, and others, including in parts of Malibu, Pacific Palisades and Sierra Madre.The county posted a map with the evacuations.

(An evacuation warning means there’s impending danger and residents should prepare to leave, while an order means there’s an immediate threat and residents should leave immediately.)

“As we know, rain is forecast for the next few days, which mean our fire impacted communities need to be on alert,” Los Angeles County Supervisor Kathryn Barger said at a Wednesday morning news conference. “The risk of mudflow and landslides is real.”