Right now
The most recent data we hold from HEAT GOV arrived 28 minutes ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
This alert is in force until 12 September 2026, 01:15 UTC.
It is the 12th strongest of the 21 detections recorded within 20 km of this point since 1 May 2026. The last comparable one was on 28 August 2026.
What the source measured
HEAT GOV reported: * WHAT...Temperatures up to 103 and heat index values up to 108 degrees expected. * WHERE...The I-35 corridor and Coastal Plains. * WHEN...From noon to 7 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
An estimated 228,257 people live within 50 km of this point.
Nearby, since 1 May 2026
- August 28, 2026 · score 43 · 10.8 km
- August 27, 2026 · score 37 · 18.4 km
- August 27, 2026 · score 37 · 18.9 km
How we know
One source: HEAT GOV. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100, at 69 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 69% |
| Coordinates | 29.6924, -97.7604 |
| Nearest City | Seguin (24 km) |
| Population Exposed | 228.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-12T17:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-12T12:00:00-05:00 |
| Expires | 2026-09-11T20:15:00-05:00 |
| AreaDesc | Williamson; Hays; Travis; Bastrop; Lee; Bexar; Comal; Guadalupe; Caldwell; Fayette; Atascosa; Wilson; Karnes; Gonzales; De Witt; Lavaca |
| SenderName | NWS Austin/San Antonio TX |
| ZonesUsedForCentroid | 8 |
| ZoneCount | 16 |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
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