Wildfires began breaking out in Southern California Tuesday morning as a life-threatening, widespread windstorm that could be one of the most destructive to hit the region in over a decade roars to life and creates extremely dangerous fire weather conditions.

Tens of thousands of people have fled their homes as a brush fire in the Pacific Palisades has grown to nearly 20,000 acres on Thursday.

Strong winds — with gusts as high as 79 mph in the San Gabriel Mountains — began blowing their way through Southern California on Tuesday morning, Jan. 7, leading to the possibility of downed trees and wires, power outages and dangerous fire weather.