"A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly," the NWS said.

The fires come as San Diego County mountains and valleys, along with other parts of Southern California, remain under a red flag warning.

CASTAIC, Calif. — Evacuation orders were lifted Thursday for tens of thousands as firefighters with air support slowed the spread of a huge wildfire churning through rugged mountains north of Los Angeles, but new blazes erupted in San Diego County, briefly triggering more evacuations.

The National Weather Service said there is a 15-25% chance of thunderstorms across the region, which could bring periods of heavy rainfall that could overwhelm the burn-scar areas.

There is a 10% to 20% chance of flash flooding and landslides in some recently burned areas of Los Angeles County, forecasters say, including the Palisades and Eaton fire areas.

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The Los Angeles County Sheriff's Department said in an update Thursday that 18 people remain missing after the Southern California wildfires. Overall, authorities received a total of 43 missing persons reports related to the Eaton and Palisades fires. Of those, 12 were located safe.

At least 28 people are believed to be dead and more than a dozen others remain unaccounted for as multiple wildfires rage across Southern California.

Numerous wildfires have ignited in southern California this month, killing at least 27 people and spanning thousands of acres.

The Palisades and Eaton wildfires continue burning in the Los Angeles area that left parts of Southern California with devastating fire damage.

Firefighters continue to battle multiple fires that broke out this month, destroying more than 16,000 structures and leaving at least 28 dead.