UPDATE **** The town of Hartville and residents along Pleasant Valley Road have been urged to evacuate. The fire is estimated at 2500 acres and is 20% contained.

GUERNSEY, Wyo. (AP) — Authorities are telling people in a community in southeast Wyoming to be ready to evacuate in case a large wildfire spreads in their direction.

They're telling the 70 people who live in Hartville on the east side of Guernsey State Park to be ready to leave in an hour's notice.

A wildfire has burned over six square miles of the park since Saturday. Hundreds of campers had to evacuate and the park remains closed.

Wyoming State Forester Bill Crapser said Monday one structure has burned and the fire is 20 percent contained. Crapser says for a time Sunday the wildfire was threatening Guernsey, a town of about 1,000 people southeast of the state park.

Another wildfire that has burned 13 square miles northwest of Wheatland is now almost fully contained.