Photos: Dangerous Colorado wildfires threaten homes, communities The smoke plume obscures the sun as smoke tops a ridge in this view from 75th Street as several wildfires burn in the state Wednesday, Oct. 21, 2020, in Niwot, Colo. (AP Photo/David Zalubowski)
Photos: Dangerous Colorado wildfires threaten homes, communities Smoke obscures the sun along Highway 7 as several wildfires burn in the state Wednesday, Oct. 21, 2020, in Lyons, Colo. (AP Photo/David Zalubowski)
Photos: Dangerous Colorado wildfires threaten homes, communities Smoke obscures the mountains as several wildfires burn as a cyclist crosses Highway 119 late Wednesday, Oct. 21, 2020, in Boulder, Colo. (AP Photo/David Zalubowski)
Photos: Dangerous Colorado wildfires threaten homes, communities Sky choked with black smoke is reflected in the outside rear view mirror of a vehicle heading south on 75th Street as several wildfires burn in the state Wednesday, Oct. 21, 2020, in Niwot, Colo. (AP Photo/David Zalubowski)
Photos: Dangerous Colorado wildfires threaten homes, communities Smoke rises from mountain ridges as several wildfires burn in the state Wednesday, Oct. 21, 2020, as traffic moves along 75th street in Niwot, Colo. (AP Photo/David Zalubowski)
Photos: Dangerous Colorado wildfires threaten homes, communities A pair of cyclists head along Highway 7 from a roadblock into a housing area as several wildfires burn in the state Wednesday, Oct. 21, 2020, in Lyons, Colo. (AP Photo/David Zalubowski)
Photos: Dangerous Colorado wildfires threaten homes, communities The CalWood fire burns on a hillside near Sixmile Canyon northwest of Boulder, Colorado, on Saturday, October 17, 2020. (Eric Lutzens/MediaNews Group/The Denver Post via Getty Images)
Photos: Dangerous Colorado wildfires threaten homes, communities A slurry bomber drops retardant over the CalWood fire near Buckingham Park northwest of Boulder, Colorado, on Saturday, October 17, 2020. (Eric Lutzens/MediaNews Group/The Denver Post via Getty Images)
Photos: Dangerous Colorado wildfires threaten homes, communities The CalWood fire burns on a hillside near Buckingham Park northwest of Boulder, Colorado, on Saturday, October 17, 2020. (Eric Lutzens/MediaNews Group/The Denver Post via Getty Images)
Photos: Dangerous Colorado wildfires threaten homes, communities Bicyclists wear face coverings while moving along the path along Highway 36 as the sky turns dark behind them from a smoke plume from several wildfires burning in northern and western Colorado, Saturday, Oct. 17, 2020, near Boulder, Colo. (AP Photo/David Zalubowski)
Photos: Dangerous Colorado wildfires threaten homes, communities Smoke darkens the sky behind the skyline as several wildfires burn in northern and western Colorado and smoke funnels on to the eastern plains late Friday, Oct. 16, 2020, in Denver. (AP Photo/David Zalubowski)
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