Firefighters were rushing to contain a blaze in northern Los Angeles County that had ballooned to more than 200 acres (81 hectares) in less than two hours Thursday afternoon, according to the Los Angeles County Fire Department.

Some residents in the small community of Acton were ordered to evacuate at the same time officials warned the blaze was a threat to the Angeles National Forest, less than a year after the Los Angeles area wildfires tore through the forest.

The fire department said the Hawk Fire was uncontained.

Wildfire risk is elevated because Southern California has seen very little rain, drying out vegetation and making it “ripe to burn,” the National Weather Service for Los Angeles warned in a statement last week.