A wind-driven wildfire along Interstate 5 near Grapevine exploded to more than 11,000 acres early Sunday and had carved a path south toward the town of Castaic, prompting hundreds of evacuations, authorities said. The Post Fire, which broke out Saturday in Gorman in northwest Los Angeles County, was 0% contained early Sunday as high winds, low humidity and steep terrain hampered efforts. fire extinguishing.
Meanwhile, firefighters were battling another wildfire in the San Bernardino County community of Hesperia that broke out after 6 p.m. Saturday in the 18000 block of Highway 173 North.
Crews conduct a burning operation Sunday near Hungry Valley Road.
(Robert Gauthier / Los Angeles Times)

Members of Little Tujunga Hot Shots at work.
(Robert Gauthier / Los Angeles Times)

Firefighters working in Gorman.
(Eric Thayer/Associated Press)

The Post fire advances on structures in Gorman.
(Eric Thayer/Associated Press)

As the fire spreads, experts are gauging the severity of this year's fire season. A wet winter has created a potentially heavy fuel load of thick grasses, which dry out as temperatures rise.
(Márcio José Sánchez / Associated Press)

The Post fire leaves a smoldering hillside.
(Márcio José Sánchez / Associated Press)