The Hennessey Fire in central Napa County has grown to 750 aces since it was first reported at 6:40 a.m., authorities said.
“There are some structures threatened in the area,” said CalFire spokesman Will Powers. Mandatory evacuations were ordered in the heavily wooded area, covering Sage Canyon Road from Chiles Pope Valley Road to Lower Chiles Road, Highway 128 at Silverado Trail to Chiles Pope Valley Road, including Pritchard Hill, and Highway 128 at Lower Chiles Valley Road to Turtle Rock.
Powers said he didn’t know how many homes were in the affected area, nor whether the fire was started by a lightning strike. The fire started in the 60 block of Hennessey Ridge Road, east of St. Helena, and was zero percent contained, Powers said at 2 p.m.