Dry conditions across Southern California set the stage for a series of deadly wind-driven wildfires that burned thousands of homes and other structures in the Los Angeles area in early January 2025.

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.

By the time the winds get to the point where the Eaton Fire broke out in Altadena on Jan. 7, it’s not uncommon for them to have less than 5 percent relative humidity, meaning essentially no moisture at all.