Los Angeles County's first significant storm in more than eight months has already forced the closure of the 5 freeway at the Grapevine, unleashed mud on roadways, and triggered the closure of Malibu's public schools Monday due to dangerous road conditions.

Much-need rain has begun to fall over Southern California, bringing relief to the drought-stricken region but also the threat of toxic runoff.

All public Malibu schools will be closed Monday due to the storm causing dangerous road conditions and bringing challenges with accessing the schools, the Santa Monica-Malibu Unified School District announced.

Palisades Fire initially started 10:30 a.m. Jan. 7 in Los Angeles County. It has burned 23,448 acres after being active for 19 days. A crew of 1,043 firefighters has been working on site and they managed to contain 90% of the fire by Sunday evening. The blaze's cause remains under investigation.

The rain is raising concerns about potential mudslides in recent burn scar areas, including Malibu, Altadena, and other regions.

All Malibu-area schools will be closed on Monday due to the risk posed by unsafe road condition in the area following heavy rain near the Palisades Fire burn scar.

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

Less than an inch of rain fell in most areas, but it was enough to loosen Los Angeles hillsides charred by the blaze near the Pacific Palisades, where crews working before dawn cleared inundated roadways.

It occurred at about 11:05 p.m. about 10 miles northwest of Malibu, according to the United States Geological Survey​

The 10,396-acre Hughes fire reached 56% containment Friday as first responders made progress controlling multiple blazes burning in Los Angeles County, which is expected to receive rain over the weekend that could be capable of producing floods and mudslides in several burned areas.

Dozens of people are believed to have died in the Palisades and Eaton fires, which have burned down whole swaths of communities

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