Wildfire covers 37 square miles

(WOODWARD, Okla.) - Emergency workers say a wildfire was about 70 percent contained Tuesday.

The flames destroyed at least six structures.

Oklahoma Forestry Services spokeswoman Michelle Finch-Walker said a wind shift caused the fire to burn back into itself, allowing crews to make significant progress.

Woodward County Emergency Manager Matt Lehenbauer said 125 people were evacuated from their homes Monday. The evacuation is now voluntary.

Lehenbauer said some firefighters have suffered exhaustion, but there are no serious injuries.

The fire began Monday near Boiling Springs State Park northeast of Woodward. The cause hasn't been determined. Lehenbauer said they're still accessing the damage.