Right now
The most recent data we hold from HEAT GOV arrived 13 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 16 September 2026 at 00:00 UTC. It is kept here as a record.
What the source measured
HEAT GOV reported: * WHAT...Heat index values up to 110. * WHERE...Portions of south central and southeast Texas. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Urban PEI: 587,244 within a heuristic 50 km radius; not unique people.
How we know
One source: HEAT GOV. Not yet confirmed by a second, independent source.
Our own score for this event is 41 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 41 / 100 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 30.0698, -95.8804 |
| Nearest City | Cypress (21 km) |
| Urban exposure index (PEI) | 587.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-15T12:12:00.000Z |
| Source | http://www.weather.gov |
Physical priority index · v5. 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: 2026-09-15T12:12:00.000Z.
First archived: 2026-09-15T12:25:20.168Z. 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 | 2026-09-15T07:12:00-05:00 |
| Expires | 2026-09-15T19:00:00-05:00 |
| AreaDesc | Houston; Trinity; Madison; Walker; San Jacinto; Polk; Burleson; Brazos; Washington; Grimes; Montgomery; Northern Liberty; Colorado; Austin; Waller; Inland Harris; Wharton; Fort Bend; Inland Jackson; Inland Matagorda; Inland Brazoria; Inland Galveston; Coastal Harris; Coastal Jackson; Coastal Galveston |
| SenderName | NWS Houston/Galveston TX |
| ZonesUsedForCentroid | 8 |
| ZoneCount | 25 |
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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