Three rapidly growing Southern California wildfires have burned more than 100,000 acres in less than a week and continued to threaten homes in multiple communities as the state mobilized an all-hands-on-deck response to bolster front-line fire crews battling the raging flames.

Fueled by a punishing heat wave and fanned by gusting winds, the biggest blaze is the Bridge Fire, which ignited Sunday in the Angeles National Forest about 31 miles east of downtown Los Angeles and exploded overnight from about 4,000 acres on Tuesday to nearly 48,000 acres by Wednesday morning, according to the California Department of Forestry and Fire Protection.

The fire remained out of control with 0% containment after spreading across Los Angeles and San Bernardino counties. Authorities issued widespread evacuation orders as the fire tore through the towns of Wrightwood and Mt Baldy, destroying at least 33 homes, several cabins, and racing through a ski resort.

At least 33 homes in Wrightwood and Mt. Baldy have been destroyed and another 2,500 structures in the area are being threatened by the fire, according to Cal Fire.