COOPERTON, Okla. (AP) Fire crews have a wildfire that's burned about 15 square miles in southwestern Oklahoma 75 percent contained. Comanche County Emergency Management Agency spokesman Jacob Russell said in an email that crews from 15 fire departments had controlled the south and west sides of the blaze, and are focusing their efforts on preventing the flames on the north and east sides from spreading into the Wichita Mountains Wildlife Refuge.

Officials have said the fire is about 1 mile long and 15 miles wide. Seventy-five to 100 homes were evacuated after the blaze began Wednesday near Cooperton in Kiowa County. Russell says several firefighters were treated for heat exhaustion and released, but there have been no other injuries reported.

Cooperton is about 115 miles southwest of Oklahoma City.