Extreme Heat Warning Issued for Duval, La Salle, McMullen and Webb Counties
This alert is no longer in effect.
NOAA issued it on July 18, 2026, 5 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
An Extreme Heat Warning is in effect from noon to 8 PM CDT Thursday for Duval, La Salle, McMullen and Webb Counties, with heat index values up to 120 expected.
Read this weather record in 30 seconds
- Record type
- Extreme Heat Warning
- Affected area
- South Texas
- Issued
- July 18, 2026
- Issuing authority
- NWS Corpus Christi TX
Heat notices are time-bound and location-specific. Confirm the current forecast and local public-health guidance before relying on this archived record.
Record status: historical. It was issued 5 weeks ago; use the issuing agency's live warning service for current conditions in South Texas.
Alert Details
Extreme Heat Warning issued by NWS Corpus Christi TX. The alert was sent at 12:40 PM CDT on June 17, 2026, and is effective from 12:40 PM CDT June 17 through 8:00 PM CDT June 18, 2026.
Affected Areas
Duval, La Salle, McMullen, and Webb Counties in Texas.
What You Should 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.
Expected Conditions
Dangerously hot conditions with heat index values up to 120 expected.
Timeline
The warning is in effect from noon to 8 PM CDT Thursday, June 18, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (726 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to July 18, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.