Weather Alerts For Arvada, CO

# HEADLINE -------------------- HEAT ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO 9 PM MDT THIS EVENING HEAT ADVISORY NOW IN EFFECT FROM 10 AM TO 9 PM MDT SUNDAY # DETAILS -------------------- WHAT Temperatures of 99 to 103 on both today and Sunday. WHERE Fort Collins, Boulder, Denver metro, and Greeley. WHEN From 10 AM to 9 PM MDT both today and Sunday. IMPACTS Hot temperatures may cause heat illnesses. ISSUED AT Saturday, July 25, 2026 at 12:59 AM MDT ISSUED BY National Weather Service Denver CO HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. # AREAS AFFECTED -------------------- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County, Central and South Weld County, Larimer County Below 6000 Feet/Northwest Weld County, North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County Including the cities of Hereford, Lakewood, Arvada, Fort Collins, Golden, Fort Lupton, Loveland, Brighton, City of Denver, Littleton, Greeley, Nunn, Denver International Airport, Roggen, Parker, Boulder, Longmont, Eaton, Aurora, and Highlands Ranch

# HEADLINE -------------------- OZONE ACTION DAY ALERT FROM 400 PM FRIDAY UNTIL 400 PM SATURDAY # SUMMARY -------------------- The Colorado Department of Public Health and Environment has issued the following... WHAT...Ozone Action Day Alert. # DETAILS -------------------- WHERE Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN 400 PM Friday July 24 to 400 PM Saturday July 25 IMPACTS Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Hot and sunny weather will allow ozone to reach the Unhealthy for Sensitive Groups category on Friday and Saturday. The highest concentrations are expected in the Denver Metro Area. For Colorado air quality conditions, forecasts, and advisories, visit: https://www.colorado.gov/airquality/colorado\_summary.aspx If possible, please help us reduce ozone pollution by limiting driving gas and diesel-powered vehicles until at least 4 p.m. Saturday, July 25, 2026. Colorado is also addressing ozone pollution through state policies. For more information about health impacts and how ozone pollution forms in Colorado, visit: https://cdphe.colorado.gov/ozone- pollution-and-your-health 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. ISSUED AT Friday, July 24, 2026 at 4:10 PM MDT ISSUED BY Relayed by National Weather Service Boulder CO HEADER Air Quality Alert Message | Colorado Department of Public Health and Environment # AREAS AFFECTED -------------------- Denver, Adams, Arapahoe, Boulder, Broomfield, Douglas, Jefferson, Larimer, Weld