A wildfire dubbed the Steele Fire ignited in Napa County on Wednesday, rapidly expanding and prompting an evacuation warning for residents in the surrounding area. The blaze, which began as a 10-acre vegetation fire, quickly grew to 70 acres in less than an hour, according to CalFire.

The fire broke out on the 9400 block of Steele Canyon Road and is burning near the Steele Canyon Resort, a campground located on Lake Berryessa. The evacuation warning has been issued for the area east of Steele Canyon Road, west of Wragg Canyon Road, and north of Highway 128.

Firefighters are actively battling the Steele Fire, with 110 personnel and air resources deployed to the scene. The efforts are focused on containing the blaze as it threatens at least one structure.

Wildfire in Napa County emitting a large plume of smoke over hills.

The Steele Fire, a wildfire in Napa County, produces a large plume of smoke over a dry, hilly landscape.

A helicopter drops water on a wildfire, with smoke filling the sky and barren trees on the hills.