This alert is in force until 3 September 2026, 08:00 UTC.
It is the 12th strongest of the 13 detections recorded within 20 km of this point since 26 April 2026. The last comparable one was on 5 July 2026.
What the source measured
HEAT GOV reported: * WHAT...For the first Heat Advisory, heat index values up to 108 expected. For the second Heat Advisory, heat index values up to 107 expected. * WHERE...Portions of central, northern, southeast, southern, and southwest Oklahoma and northern Texas. * WHEN...For this afternoons Heat Advisory, un...
An estimated 136,374 people live within 50 km of this point.
Nearby, since 26 April 2026
- May 10, 2026 · score 43 · 21.2 km
- June 6, 2026 · score 43 · 24.1 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 67 % 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 | 67% |
| Coordinates | 34.7255, -97.9026 |
| Nearest City | Duncan (26 km) |
| Population Exposed | 136.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T18:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-03T13:00:00-05:00 |
| Expires | 2026-09-03T03:00:00-05:00 |
| AreaDesc | Grant; Garfield; Kingfisher; Logan; Canadian; Oklahoma; Jackson; Tillman; Comanche; Stephens; Murray; Coal; Cotton; Jefferson; Carter; Johnston; Atoka; Love; Marshall; Bryan; Wilbarger; Wichita; Archer; Clay |
| SenderName | NWS Norman OK |
| ZonesUsedForCentroid | 12 |
| ZoneCount | 24 |
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.
Want to know when something happens near Duncan?
Calamity.live data shows a weather event with CalamityScore 37/100, near Duncan (United States), based on data from heat_gov. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.