In the rain-soaked mountain resort of Wrightwood, east of Los Angeles, emergency crews spent much of the day answering dozens of rescue calls and pulling drivers to safety from submerged vehicles, San Bernardino County Fire Department spokesperson Christopher Prater said.
No casualties were reported as of Wednesday night, according to Prater.
Aerial video footage posted online by the fire department showed rivers of mud coursing through inundated cabin neighborhoods.
Downpours measuring an inch (2.54 cm) or more of rain an hour in some areas were spawned by the region's latest atmospheric storm, a vast airborne current of dense moisture siphoned from the Pacific and swept inland over the greater Los Angeles area.
