Threat level: The heavy rains will bring a "high likelihood" of flooding, the National Weather Service warns. The greatest risk is for mudslides and debris flows in Southern California's large, recent burn scars.

Days after an atmospheric river brought record-setting rainfall to California, the state is in the crosshairs of another rainy storm system.

A major atmospheric river storm is barreling toward California, raising the specter of damaging landslides and flooding across much of the Southland.

Southern California is in desperate need of rain, but it could come far too fast this week, especially in areas recently burned by wildfires.