BOISE, Idaho (AP) — Evacuations notices of various levels remain in effect in west-central Idaho where a wildfire burning in timber expanded by 12 square miles to 135-square-miles Tuesday.

Fire managers say crews are working to protect structures along the Salmon River corridor and that rafters are being stopped and evacuated before entering the fire perimeter.

The fire has expanded by more than 50 square miles after jumping the Salmon River over the weekend amid strong winds.

In northern Idaho, a 53-square-mile fire is within 5 miles of the Fenn Ranger Station, built in 1936 and listed on the National Register of Historic Places.

Fire managers say the fire has expanded rapidly in recent days due to gusty winds and a shortage of firefighting resources.

Eighteen large wildfires are burning in Idaho.