An ozone alert is issued for the the metro area and Front Range.

The Front Range, from Castle Rock to the Wyoming border, is under an air quality advisory until 4 p.m. on Friday.

The Colorado Department of Public Health and Environment and the Regional Air Quality Council have issued an Ozone Action Day Alert which includes Denver, Greeley, Fort Collins and other cities along the Front Range. Counties in the alert are: Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, Jefferson, Larimer and Weld.

Health officials, as part of the alert, ask area residents to limit driving gas and diesel vehicles if possible.

Light winds, hot weather and lots of sunshine are fueling ozone concentrations that are in a moderate to unhealthy range for sensitive groups, according to the CDPHE. Parts of the metro area west of Interstate 25, including the foothills, could see the highest concentrations.

For more information online go to the state health department’s air quality page.

Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion, the alert warns. An increasing likelihood of respiratory symptoms and breathing discomfort could be brought on by current air quality in the alert zone.