* WHAT. High temperatures both Monday and Tuesday will be in the mid to upper 90s. Overnight lows will be in the mid to upper 60s. * WHERE. Metropolitan Denver. * WHEN. From 11 AM this morning to 9 PM MDT Tuesday. * IMPACTS. Hot temperatures may cause heat illnesses.

* WHAT. Temperatures in the mid to upper 90s this afternoon. * WHERE. Boulder and the western suburbs of Denver. * WHEN. From 11 AM this morning to 9 PM MDT this evening. * IMPACTS. Hot temperatures may cause heat illnesses.

* WHAT. High temperatures in the mid 90s to 104 today and Tuesday. * WHERE. El Paso, Pueblo, and Eastern Fremont Counties. * WHEN. For the first Heat Advisory, from noon today to 6 PM MDT this evening. For the second Heat Advisory, from 11 AM to 7 PM MDT Tuesday. * IMPACTS. Hot temperatures may cause heat illnesses.

The Colorado Department of Public Health and Environment has issued the following. WHAT. Ozone Action Day Alert. WHERE. Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN. 400 PM Sunday June 23 to 400 PM Monday June 24 IMPACTS. Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Request to limit driving gas and diesel- powered vehicles is now in effect until at least 4 p.m. Monday, June 24, 2024. Hot, stagnant weather conditions will result in ozone concentrations reaching the Unhealthy for Sensitive Groups category on Sunday and Monday. These elevated ozone concentrations are most likely for locations in and near the Denver metro area. For areas included in this advisory that are not expected to reach the Unhealthy for Sensitive Groups (USG) air quality designation, we request that activities, such as driving non-ZEV vehicles (i.e., gas or diesel), be reduced to lessen the impacts on neighboring air quality. Additional air pollution in this region may directly worsen air quality or contribute to precursors which may also adversely affect air quality. For Colorado air quality conditions, forecasts and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx HEALTH INFORMATION. Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with lung disease, such as asthma. Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion.