GUERNSEY, Wyo. (AP) — Residents of Hartville have been placed on alert for possible evacuation as firefighters continue to make progress battling a wildfire at Guernsey State Park in southeast Wyoming.

Authorities say the fire is about 20 percent contained after scorching about four square miles since Saturday.

Fire spokeswoman Beth Hermanson says the evacuation alert is voluntary and only a precaution to help firefighters.

Elsewhere in Wyoming, firefighters had about 95 percent containment on a fire in northeast Albany County that has burned about 13 square miles since June 3. Most of the firefighters assigned to the fire were sent to other fires, including the one at Guernsey State Park.

A wildfire that burned about 1,700 acres in Weston County in northeast Wyoming is 100 percent contained.