LOS ANGELES (AP) — The second in a string of powerful storms battered California on Saturday, shutting key highways after water and mud rushed into lanes from bare hillsides in wildfire burn areas where thousands of residents were under evacuation orders.

Flash flood warnings were issued for huge swaths of Southern California and forecasters said the system brought more than 4 inches (10 centimeters) of rain at lower elevations and several feet of snow in the mountains, where whiteout conditions closed roads.