The Colorado Department of Public Health and Environment and the Regional Air Quality Council issued a health advisory due to smoke from wildfires in Colorado and the western U.S.
The alert went into effect Monday afternoon and lasts through 4 p.m. Tuesday for many areas along the Front Range - from Douglas County north to Larimer and Weld counties, including the Denver-Boulder area, Fort Collins and Greeley.
Smoke originating from wildfires in other western states, along with the rapidly growing Morgan Creek fire near Steamboat Springs, has resulted in the haze.
As a result of the smoke, a health advisory has been issued because of a drop in air quality. If smoke becomes thick in a given area, it is advised that people limit their time outdoors.
People with heart diseases, respiratory issues, the very young and the elderly are most susceptible to concerns related to the smoke.
Dangerous smoke is expected to be present through at least Tuesday morning, with the air quality health advisory applying to Routt, Jackson, Grand, Garfield, Eagle, Summit, Mesa, Delta, Gunnison, Pitkin, Lake, Delta, Montrose and Gunnison counties.
While smoke is expected to decrease on Monday morning, it's expected to increase again during afternoon hours. Smoke is expected to settle into areas of lower elevation by Monday night.
Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld counties are also being impacted by poor air quality on Monday, with an ozone action day alert posted through Monday afternoon.
According to the alert from the National Weather Service, "warm temperatures, light winds, stagnant conditions, and smoke from western wildfires are expected to increase ozone and particulate concentration along the northern Front Range, including the Denver metro area."
It has been requested that those in this area opt to drive less under these conditions.
Find a forecast map of the smoke in Colorado embedded below: