The Department of Natural Resources says a wildfire burning near Goldendale in south-central Washington has doubled in size to about 4,600 acres or about 7 square miles.

Spokeswoman Janet Pearce in Olympia says firefighters Friday are still trying to build lines to contain the fire that broke out Monday and is burning grass, brush and timber.

Most of Highway 97 between Goldendale and Toppenish including Satus Pass remains closed due to smoke and the danger of debris rolling off steep hillsides.

Pearce says one structure -- not necessarily a home -- has been lost. About 30 homes in the area are threatened with some people evacuating.

Pearce describes fire conditions Friday as extreme. The Weather Service has issued a red flag warning for the danger in much of Eastern Washington.