It's been burning for two weeks already, and Montana authorities figure a wildfire there will only get bigger.
It's already up to 300 square miles, but loads of dead trees, combined with high winds, are expected to increase that number.
Hundreds have been forced to evacuate since a lightning strike started the fire on August 22. But as it moves on and with nearly half of it contained, residents could be returning home Friday.
Meanwhile, firefighters from three states are battling a wildfire just 20 miles west of the Las Vegas Strip. Lightning touched it off Wednesday, but authorities now hope to have it contained by Thursday night.
And in Washington state, about a dozen wildfires are burning, including one going since last month. The biggest fire covers close to 260 square miles near the Canadian border.