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A second winter storm is bringing another round of rain and snow to Southern California Thursday, prompting officials to keep mandatory evacuation orders in place for some Orange County burn areas and partially close the Grapevine.

Wednesday’s storm brought cold temperatures and heavy downpours across the region.

At one point, debris began to flow toward homes in the Silverado Canyon area.

Nine vehicles and seven homes were damaged in the mudslide, according to Orange County Fire Authority officials.

Some residents reported up to 4 feet of mud inside their homes.

Cleanup crews worked overnight but the likelihood of more rain has officials concerned about another possible slide.

Mandatory evacuation orders remain in place for the Bond Fire burn areas, including Silverado Canyon, Williams Canyon and Santiago Canyon Road. About 4:40 p.m., officials changed evacuation orders for the Modjeska Canyon communities from mandatory to voluntary.

A flash flood watch remains in place for the region through Thursday evening, according to the National Weather Service.

A second storm system moved over Southern California Thursday, bringing widespread rain, a chance of thunderstorms and cold temperatures through the evening.

Periods of heavy rain were reported in some areas of L.A. County Thursday morning and afternoon.

Snow levels are expected to drop to as low as 2,500 feet, according to the Weather Service.

Weather conditions prompted the partial closure of the Grapevine Thursday afternoon, officials said.

The southbound side of the 5 Freeway was closed from Grapevine Road to Lake Hughes Road after snow began sticking to the roadway, according to Caltrans and the California Highway Patrol. The northbound side remained open “but may close soon,” officials tweeted.

Video showed snow falling on the 15 Freeway through the Cajon Pass early Thursday morning.

Snow plows were keeping the roadway open as California Highway Patrol vehicles escorted drivers through the area.

A winter storm warning is in place through 10 p.m. for higher elevations in the San Bernardino County Mountains.

Another 6 to 12 inches of snow are expected to fall above the 5,000 foot mark.

Chains are required for travel on mountain roads.

Drivers are also encouraged to check their wiper blades and tire pressure, and keep a blanket, snacks, water and a phone charger in their car while traveling in winter conditions.

A chance of rain continues into Friday afternoon. Sunny skies are expected to return by Saturday.