Right now
The most recent data we hold from HEAT GOV arrived 6 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 14 September 2026 at 01:45 UTC. It is kept here as a record.
It is the 12th strongest of the 23 detections recorded within 20 km of this point since 1 May 2026. The last comparable one was on 13 September 2026. 2 more were recorded here in the fortnight before it.
What the source measured
HEAT GOV reported: * WHAT...For the first Heat Advisory, heat index values up to 111. For the second Heat Advisory, heat index values up to 111 expected. * WHERE...The I-35 corridor and Coastal Plains. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from noon to 7 ...
Urban PEI: 228,257 within a heuristic 50 km radius; not unique people.
Nearby, since 1 May 2026
- September 13, 2026 · score 37 · 0.0 km
- September 12, 2026 · score 37 · 0.0 km
- August 28, 2026 · score 43 · 10.8 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 29.6924, -97.7604 |
| Nearest City | Seguin (24 km) |
| Urban exposure index (PEI) | 228.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-14T17:00:00.000Z |
| Source | http://www.weather.gov |
Physical priority index · v4 (historical). Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: heat_gov. Occurrence: 2026-09-14T17:00:00.000Z.
First archived: 2026-09-13T17:41:21.822Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-14T12:00:00-05:00 |
| Expires | 2026-09-13T20:45:00-05:00 |
| 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.
Review the area, threshold and delivery channel in your account.
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