Brazoria 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 Wednesday 07/22 11:00 AM CDT – Wednesday 07/22 8:00 PM CDT
Issued by NWS Houston/Galveston TX
What
For the Heat Advisory, heat index values up to 109. For the Extreme Heat Warning, dangerously hot conditions with high temperatures between 100 to 104 and heat index values up to 115 expected.
Where
Portions of south central and southeast Texas.
When
For the Heat Advisory, until 8 PM CDT this evening. For the Extreme Heat Warning, from 11 AM to 8 PM CDT Wednesday.
Impacts
Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
What to Do
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
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. To reduce risk during outdoor work, 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 9 1 1.
Extreme heat is dangerous, especially for those without reliable shelter. Limit time outdoors during the hottest time of the day, typically from 1 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.
Stay cool, stay hydrated, stay informed.
Areas Impacted
- Houston
- Trinity
- Madison
- Walker
- San Jacinto
- Polk
- Burleson
- Brazos
- Washington
- Grimes
- Montgomery
- Northern Liberty
- Colorado
- Austin
- Waller
- Inland Harris
- Chambers
- Wharton
- Fort Bend
- Inland Jackson
- Inland Matagorda
- Inland Brazoria
- Inland Galveston
- Southern Liberty
- Coastal Harris
- Coastal Jackson
- Coastal Matagorda
- Coastal Brazoria
- Coastal Galveston
- Matagorda Islands
- Brazoria Islands
- Galveston Island
- Bolivar Peninsula
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 12:50 PM CDT – Tuesday 07/21 8:00 PM CDT
Issued by NWS Houston/Galveston TX
What
For the Heat Advisory, heat index values up to 109. For the Extreme Heat Warning, dangerously hot conditions with high temperatures between 100 to 104 and heat index values up to 115 expected.
Where
Portions of south central and southeast Texas.
When
For the Heat Advisory, until 8 PM CDT this evening. For the Extreme Heat Warning, from 11 AM to 8 PM CDT Wednesday.
Impacts
Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
What to Do
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
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. To reduce risk during outdoor work, 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 9 1 1.
Extreme heat is dangerous, especially for those without reliable shelter. Limit time outdoors during the hottest time of the day, typically from 1 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.
Stay cool, stay hydrated, stay informed.
Areas Impacted
- Houston
- Trinity
- Madison
- Walker
- San Jacinto
- Polk
- Burleson
- Brazos
- Washington
- Grimes
- Montgomery
- Northern Liberty
- Colorado
- Austin
- Waller
- Inland Harris
- Chambers
- Wharton
- Fort Bend
- Inland Jackson
- Inland Matagorda
- Inland Brazoria
- Inland Galveston
- Southern Liberty
- Coastal Harris
- Coastal Jackson
- Coastal Matagorda
- Coastal Brazoria
- Coastal Galveston
- Matagorda Islands
- Brazoria Islands
- Galveston Island
- Bolivar Peninsula
Tips to Stay Safe
A Heat Advisory means dangerous heat conditions are happening now or soon. Take action before, during and after the heat to stay safe.
- Stay in air-conditioned spaces if possible. Find cooling centers or places with AC in your community that you can go to, like libraries or shopping malls.
- Stay hydrated and stock up on clean drinking water to get you through multiple days of heat.
- Reschedule outdoor activities for cooler times of the day, and take breaks in the shade or air conditioning.
- Cover windows with curtains or shades, or use window reflectors designed to reflect heat back outside.
- Check on friends, family, and neighbors, especially those who do not have air conditioning or spend much of their time alone.
Make sure you know the signs of heat-related illness and how to respond.
In effect from Tuesday 07/21 2:45 PM CDT – Wednesday 07/22 8:00 PM CDT
Issued by NWS Houston/Galveston TX
AQAHGX
The Texas Commission on Environmental Quality (TCEQ) has issued an Ozone Action Day for the Houston, Galveston, and Brazoria area for Wednesday, July 22, 2026.
Atmospheric conditions are expected to be favorable for producing high levels of ozone pollution in the Houston, Galveston, and surrounding areas 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/airquality/monops/ozonefacts.html
EPA AirNow: www.airnow.gov/?city=Houston&state=TX&country=USA
Take Care of Texas: www.takecareoftexas.org/conservation-tips/keep-our-air-clean
Areas Impacted
- Inland Harris
- Inland Brazoria
- Inland Galveston
- Coastal Harris
- Coastal Brazoria
- Coastal Galveston
- Brazoria Islands
- Galveston Island
- Bolivar Peninsula
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
Dangerous Heat this Week
Created by the NWS Houston/Galveston WFO
Very hot and humid conditions are expected on Tuesday with highs in the upper 90s to near 100F. Peak heat indices around 108F. A Heat Advisory is in effect for all of Southeast Texas from 11 am to 8 pm Tuesday. Be sure to practive heat safety whereever you are.
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.
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