The long-duration atmospheric river storm is likely to cause a slew of hazards over Christmas week across California, including widespread urban flooding, downed trees, power outages and travel delays.

The threat of flash flooding in Southern California has been increased to level 4 of 4 for Christmas Eve, according to t Prediction Center. The threat is highest for the Foothills and south-facing mountains of Santa Barbara,

A powerful atmospheric river storm will bring life-threatening flooding, 80 mph winds, and up to 12 inches of rain to Southern California through Christmas week, according to the National Weather Service.

Just before Christmas, San Bernardino County average gasoline price has dropped to $4.14, a decrease of 7.8 cents per gallon over last week.