Roads have been a mess across Northern California as a storm moved through the region on Christmas. The main front of the system started passing through the region very early Wednesday morning, while another wave began early Thursday.

Gov. Gavin Newsom deployed 55 fire engines and rescue crews across the state during the storms and his declaration allows counties to request federal aid.

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

Another round of heavy snow and scattered showers is expected Friday in Northern California as tens of thousands of people across the state remain without power.

More than 122 million Americans are expected to travel at least 50 miles for Christmas and New Year's holidays this year.

A powerful Christmas storm is dumping rain across Southern California, putting at-risk communities on alert and prompting evacuation warnings.