More than 200,000 residents have been evacuated in Southern California as hot, dry Santa Ana winds fan the flames of aggressive wildfires.
The winds which blow westward from the Mohave Desert are forecast to gust up to 130 km/h before subsiding by this weekend.
Firefighters say it will be virtually impossible to fight the blazes in those conditions.
Hundreds of homes surrounding Los Angeles have burned to the ground and the fires have even been jumping freeways.
Heavy rainfall earlier this year helped suppress a lengthy drought but a record hot summer has created extremely parched conditions.