LANDER, Wyo. — Firefighters are making some progress against a wildfire burning near about 50 summer homes in Wyoming.

The 3-square-mile Fairfield Fire was 47 percent contained Wednesday night as crews patrolled containment lines around the blaze near Lander.

Fire spokesman Andy Rothleutner says structures, including homes and secondary cabins, are still threatened.

The homes and campgrounds in Sinks Canyon were evacuated after the fire broke out Monday. U.S. Forest Service spokeswoman Kristie Salzmann says no homes have been lost. Crews dug lines and an air tanker also dropped slurry to protect them.

It's the most significant fire of the season so far in Wyoming.

Crews are also fighting a fire burning on about 100 acres in the Medicine Bow National Forest. And a 380-acre wildfire in the Washakie (WASH'-ah-kee) Wilderness is being watched.