The charred soil left by the wildfires could create conditions ripe for mudslides because the rain, which will last into Monday, will just run off, forecasters said.

More rain is falling on parts of Southern California after causing mudflows over the weekend. The rain is helping firefighters but boosting the risk of toxic ash runoff in areas scorched by Los Angeles-area wildfires.

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

Southern California’s first rainy weekend of the winter has arrived. The rain event, months in the making, brought steady storms across the region as the Southland experiences drought conditions. The mostly welcome rain began Saturday night and is expected to sustain until Monday evening.

Rain was falling across Southern California on Sunday, bringing some relief to thousands of firefighters battling multiple major blazes for nearly a month in the Los Angeles area, but also prompting new threats of floods and mudslides across burn-scarred lands.

Rainfall is expected to reach Los Angeles and Southern California this weekend, bringing the risk of mudslides and fire debris flow.

The rainfall isn’t expected to cause damage this weekend, but officials still urge the public to stay prepared.

The Palisades Fire, which started on Jan. 7, has burned 23,713 acres and has destroyed 5,828 structures, including homes and businesses, according to an update from Cal Fire on Monday. At least 10 fire-related deaths have been reported in the Palisades Fire.

Southern California is about to get its first significant rainfall in months, bringing desperately needed relief after dry conditions and hazardous winds fueled a series of wildfires in January. The rain could start as early as Saturday afternoon and last through Monday night with the heaviest rain coming on Sunday,