A powerful winter storm swept across Southern California on Wednesday, with heavy rain threatening mudslides and debris flows in areas scorched by wildfires, bringing near white-out snow conditions in the mountains and hazardous travel for millions of holiday drivers.

The state has pre-positioned emergency response resources across the state, including 55 fire engines and 10 swiftwater rescue teams, to protect communities from the dangerous winter storms, according to a statement from Newsom.

Gov. Gavin Newsom has issued a state of emergency for Los Angeles County as a “dangerous holiday storm” is expected to bring several inches of rain to the area in the coming days.

Los Angeles County officials released an interactive map of evacuation warnings as a storm approaches Southern California.