The highest intensity rain was expected between 4 p.m. on Sunday and 4 p.m. on Monday, according to the service. Los Angeles and Ventura Counties were expected to get up to an inch of total rainfall, and up to three inches was forecast in the mountains around Los Angeles.

The intermittent showers sweeping across parts of Southern California on Sunday provided welcome relief for firefighters battling devastating wildfires but could bring an unwelcome side effect − mudslides.

A slow-moving low-pressure system will linger over the Southwest, bringing steady rain through at least Monday.