MEDICINE PARK, Okla. (AP) — A massive wildfire that has destroyed 13 homes and burned about 5,500 acres of land is about 40 percent contained.

Comanche County spokesman Chris Killmer says high winds re-fueled the blaze around noon Friday, pushing it farther northeast across Oklahoma Highway 58 south of Lake Lawtonka. Killmer says additional homes were evacuated before crews contained the flare-up about an hour later.

The fire erupted on Fort Sill Army Post's West Range about 5 p.m. Thursday and spread into nearby Medicine Park.

About 1,500 people were told to leave the area while more than 100 firefighters battle the blaze. Officials say two Oklahoma National Guard helicopters equipped with 600-gallon buckets are dropping water on the fire.

The only injury reported is a firefighter who sustained a minor injury to his foot.