Collin County, TX
Alerts
Alerts are listed in order of start time and level of severity. Click on the alert title to read details for each alert.
In effect from Tuesday 07/21 1:00 PM CDT – Wednesday 07/22 8:00 PM CDT
Issued by NWS Fort Worth TX
What
Dangerously hot conditions with heat index values up to 111 expected.
Where
Portions of north central and northeast Texas.
When
Until 8 PM CDT Wednesday.
Impacts
Heat related illnesses increase significantly during extreme heat and high humidity events.
What to Do
Take extra precautions when outside by staying hydrated, wearing lightweight and loose fitting clothing, and limiting strenuous activities to the early morning or evening. Check up on relatives and neighbors. Never leave young children or pets in an enclosed vehicle, even for a short time, as temperatures can quickly rise to life-threatening levels.
Know the signs and symptoms of heat exhaustion and heat stroke. To reduce risk when outdoors, the occupational safety and health administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 911 ASAP if you or someone you know is exhibiting signs of heat stroke.
Extreme heat is dangerous, especially for those without reliable shelter. Limit time outdoors during the hottest time of the day, typically from 2 to 7 PM, rest in the shade when possible, and drink plenty of water. Locate nearby cooling centers through local resources or dial 2-1-1 in Texas.
Areas Impacted
- Cooke
- Grayson
- Denton
- Collin
- Hunt
- Hopkins
- Tarrant
- Dallas
- Rockwall
- Kaufman
- Van Zandt
- Rains
Tips to Stay Safe
An Extreme Heat Warning means that extremely dangerous heat conditions are happening now or soon. You must take precautions to protect yourself and others from extreme heat.
- Stay inside in air conditioning if possible. If you don’t have air conditioning, go to a library, mall, or local cooling center.
- Drink plenty of water to stay hydrated, and wear loose, light-colored clothing.
- Check on friends, family, and neighbors, especially those who do not have air conditioning or spend much of their time alone.
- Reschedule outdoor activities for a cooler day.
- If you must be outdoors, take longer and more frequent breaks in the shade or air conditioning, and avoid the hottest parts of the day.
- Bring pets indoors if possible. If pets are left outside, make sure they have shade and plenty of cool water.
- Make sure you know the signs of heat-related illness and how to respond.
In effect from Tuesday 07/21 2:42 PM CDT – Wednesday 07/22 5:45 PM CDT
Issued by NWS Fort Worth TX
AQAFWD
The Texas Commission on Environmental Quality (TCEQ) has issued an Ozone Action Day for the Dallas-Fort Worth area for Wednesday, July 22, 2026.
Atmospheric conditions are expected to be favorable for producing high levels of ozone air pollution in the Dallas-Fort Worth area on Wednesday. You can help prevent ozone pollution by sharing a ride, walking, riding a bicycle, taking your lunch to work, avoiding drive-through lanes, conserving energy, and keeping your vehicle properly tuned.
For more information on ozone:
Ozone: The Facts (www.tceq.texas.gov/goto/ozonefacts)
Air North Texas: (www.airnorthtexas.org)
EPA Air Now (www.airnow.gov/index.cfm?action.local_state&STATEID=45&TAB=0)
Take care of Texas (www.takecareoftexas.org)
North Central Texas Council of Governments Air Quality (www.nctcog.org/trans/air/index.asp)
Areas Impacted
- Wise
- Denton
- Collin
- Hunt
- Parker
- Tarrant
- Dallas
- Rockwall
- Kaufman
- Hood
- Johnson
- Ellis
- Henderson
Tips to Stay Safe
When an Air Quality Alert is active for your location:
- Check the air quality levels in your area at airnow.gov.
- Limit your time outdoors, especially if you are at higher risk. This includes seniors, children, or those with asthma or other health conditions.
Briefings
From the Forecaster
Extreme Heat Warning Tuesday
Created by the NWS Forth Worth/Dallas WFO
An Extreme Heat Warning is in effect for locations along/east of I-35 and along/north of I-20 this afternoon and evening for heat index values up to 112 degrees. Elsewhere, a Heat Advisory remains in effect through this evening for heat index values up to 108 degrees. Stay cool and take the proper steps to keep you and your loved ones safe from heat-related illnesses.
Seven-day Weather Risk Overview
The graphic shows the daily risk summary for 7 days. Daily risk is based on highest risk factor for that day.
|
|
|
|
|
|
|
|
|
|---|---|---|---|---|---|---|---|
| risk level |
|
|
|
|
|
|
|