Damaged homes following a mudslide in Forest Falls, California. ONSCENE.TV

Deep mudslides and flash flooding hit Southern California Thursday after drenching thunderstorms fed by the moisture of former Eastern Pacific Tropical Storm Mario spread over the region.

The Oak Glen, Forest Falls and Potato Canyon areas of San Bernardino County were particularly hard hit. Mud and debris flows impacted multiple homes and covered roads across the area, about 80 miles east of Los Angeles, San Bernardino County Fire said .

About 10 people traveling in six to seven vehicles were stuck on Highway 38 as debris covered the road in both directions, the fire department said Thursday evening.

Just north, in the city of Barstow, a search was underway for a 2-year-old boy who was swept away by floodwat

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