| Event | Extreme Heat Warning |
| Severity | Severe |
| Urgency | Expected |
| Certainty | Likely |
| Area | 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 |
| Effective | 7/21/2026, 12:50:00 PM CDT |
| Expires | 7/22/2026, 6:00:00 AM CDT |
Extreme Heat Warning issued July 21 at 12:50PM CDT until July 22 at 8:00PM CDT by NWS Houston/Galveston TX
Details
* 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.
Instructions
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.
This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.
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