Air Quality Health Advisories have been issued for large portions of western and northern Colorado

Wildfires have intensified throughout eastern Utah and western Colorado. The result is heavy smoke in areas downwind of the fires. Shutting windows when smoke is present in your area, or at minimum before you head off to bed tonight, is advised in Telluride, Montrose, Delta, Grand Junction, Gunnison, Aspen, Eagle, Glenwood Springs, Meeker, Craig, Steamboat Springs, Walden, Granby, or anywhere near these communities. Stay informed on the details of the two active advisories and your local air quality. 

GOES-19 satellite imagery shows "hot spots" from large wildfires in southwestern Colorado and southeastern Utah (slider.cira.colostate.edu)

Air Quality Health Advisories for Wildfire Smoke for several counties in western and northern Colorado (colorado.gov/airquality)