GALLERY: Wildfire racing through the Rocky Mountains near Boulder, CO

A couple sit on rocks at the overlook along Highway 36 to watch a smoke plume grow as several wildfires burn in northern and western Colorado and smoke funnels on to the eastern plains Saturday, Oct. 17, 2020, near Boulder, Colo. (AP Photo/David Zalubowski)

A couple watches from the overlook along Highway 36 as a smoke plume grows from several wildfires burning in northern and western Colorado, sending smoke on to the eastern plains Saturday, Oct. 17, 2020, near Boulder, Colo. (AP Photo/David Zalubowski)

Southbound traffic backs up on Highway 36 as nearby residents evacuate as a wildland fire races through the mountains late Saturday, Oct. 17, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)

A police officer speaks to a motorist stopped at a roadblock on northbound Highway 36 at Broadway as nearby residents evacuate as a wildland fire races through the mountains late Saturday, Oct. 17, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)

In this photo provided by Shannon Kiss, smoke from the CalWood Fire billows, Sunday, Oct. 18, 2020, as seen from Gunbarrel, Colo. (Shannon Kiss via AP)

In this photo provided by Shannon Kiss, smoke from the CalWood Fire billows, Sunday, Oct. 18, 2020, as seen from Gunbarrel, Colo. (Shannon Kiss via AP)

In this photo is smoke from the Cameron Peak Fire in northern Colorado, Wednesday, Oct. 14, 2020. The Cameron Peak Fire, one of two Rocky Mountain wildfires, that have been pushed by strong winds has become the largest in Colorado's history. The Mullen Fire in southeastern Wyoming has grown little in recent days. Forecasters expect dry air and strong wind to pose a challenge for firefighters into the weekend. (Thornton Streeter via AP)

In this photo is smoke from the Cameron Peak Fire in northern Colorado, Wednesday, Oct. 14, 2020. The Cameron Peak Fire, one of two Rocky Mountain wildfires, that have been pushed by strong winds has become the largest in Colorado's history. The Mullen Fire in southeastern Wyoming has grown little in recent days. Forecasters expect dry air and strong wind to pose a challenge for firefighters into the weekend. (Thornton Streeter via AP)

Police officers stand at a roadblock to direct motorists on northbound Highway 36 at Broadway as nearby residents evacuate as a wildland fire races through the mountains late Saturday, Oct. 17, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)

Police officers move a barricade at a roadblock on northbound Highway 36 at Broadway as nearby residents evacuate as a wildland fire races through the mountains late Saturday, Oct. 17, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)