Firefighters are battling a Central Texas blaze that has destroyed at least 10 homes and two businesses.

At least two helicopters and two air tankers were dousing the estimated 400-acre wildfire near Bastrop and Smithville on Saturday. Officials have evacuated residents and shut down the highway leading into the area.

Officials say at least one firefighter has been treated for smoke inhalation. Up to 200 homes are threatened and 13 outbuildings have been destroyed.

The fire started about noon Saturday when a power line fell. Texas Forest Service spokeswoman Misty Wilburn says the fire is about 10 percent contained.

Bastrop is about 30 miles southeast of Austin.