A California storm on Christmas Eve caused flooding and mudslides, and prompted evacuations, power outages, and travel warnings as heavy rains hit the region.

AccuWeather meteorologist Brandon Buckingham said: "The fast-moving runoff can pick up rocks, mud, ash and debris, quickly turning into a debris flow that can race downhill with little warning, taking out homes, vehicles and roads along the way.”

At least three people have died and more than 110,000 homes and businesses faced power outages on Christmas Day after a powerful winter storm struck California and broke rainfall records on Wednesday, triggering road closures and flooding, as forecasters warn of more rain.

Southern California drivers were urged to stay off the road as conditions deteriorated thanks to downpours fed by an atmospheric river. Interstates were shut down by high water, and evacuation warnings were issued by the San Bernardino County Fire Department.

An atmospheric river, low pressure system, and wildfire burn scars are a volatile mix for southern Califonia this Christmas. Here's what we know.

Heavy rain from a persistent atmospheric river pattern continues to impact California this week. Here's what's causing it.

California officials are urging holiday travelers to avoid the roads on Christmas Eve and Christmas Day as a powerful winter storm moves in.