Officials in Montana, Wyoming, and Washington are worried that high temperatures and low humidity will worsen wildfires firefighters are already struggling to control.
Hundreds of people have been evacuated and thousands of acres have burned. Seven homes were destroyed near Casper, Wyo., but no deaths or injuries have been reported.
Other blazes continue to burn across the western U.S. In addition to Montana, Wyoming, and Washington, wildfires continue to rage on in Utah, California, and Oregon.
About 160 firefighters from across Washington gathered to help fight a fire burning 140 miles east of Seattle.
Resident Shannon Grosdidier and her four daughters delivered oatmeal cookies to several firefighters at the end of her street.
"The wind has died down, which is good," Grosdidier said. "But I've got the photo albums in the car and our overnight bags are packed."
Blazes have scorched more than 8.1 million acres across the west so far this year, up from the 10-year average of 6.1 million acres, according to the National Interagency Fire Center.