This information came from the Colorado Department of Public Health and Environment (CDPHE):
Air Quality Health Advisory for Wildfire Smoke
Issued for central and western Colorado
Issued at 8:00 AM MDT, Sunday, August 8, 2021
Affected Area: Moffat, Routt, Jackson, Grand, Rio Blanco, Garfield, Eagle, Summit, Gilpin, Clear Creek, Mesa, Pitkin, Lake, Park, Delta, Gunnison, Chaffee, Fremont, Montrose, San Miguel, Ouray, Hinsdale, Saguache, Custer, Dolores, Montezuma, San Juan, La Plata, Mineral, Archuleta, Rio Grande, Alamosa, Conejos, and Costilla. Locations include, but are not limited to Craig, Steamboat Springs, Walden, Hot Sulphur Springs, Meeker, Glenwood Springs, Eagle, Breckenridge, Central City, Georgetown, Grand Junction, Aspen, Leadville, Fairplay, Delta, Gunnison, Salida, Canon City, Montrose, Telluride, Ouray, Lake City, Saguache, Westcliffe, Dove Creek, Cortez, Silverton, Durango, Creede, Pagosa Springs, Del Norte, Alamosa, Conejos, and San Luis.
Advisory in Effect: 8:00 AM MDT, Sunday, August 8, 2021 to 9:00 AM MDT, Monday, August 9, 2021.
Public Health Recommendations: If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and the elderly. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present indoors and is making you ill. If visibility is less than 5 miles in smoke in your neighborhood, smoke has reached levels that are unhealthy.
Outlook: Heavy smoke from California wildfires will continue to move into Colorado Sunday, affecting western and central Colorado on Sunday and Monday. Expect the heaviest smoke impacts in sheltered valley locations where atmospheric mixing is more limited.