A flash flood warning is in effect for the mountains of southwestern San Bernardino County.
"Definitely seek higher ground if you are encountering flood waters," National Weather Service meteorologist Brandt Maxwell told KPCC. "And never ever drive through flood waters or any place where water covers the roadways, because potentially your car can get stranded, or worse, swept off the road. "
The warning is in effect until 6:30 p.m. Tuesday. Heavy rain and thunderstorms are also happening in the mountains near Big Bear and areas to the south of it, including the Lake Fire Burn Scar. People in the Lake Fire Burn Scar have a chance of encountering debris flow and mudslides, Maxwell said.