This alert is in force until 4 September 2026, 00:00 UTC.
It is the 12th strongest of the 21 detections recorded within 20 km of this point since 24 April 2026. The last comparable one was on 7 August 2026.
What the source measured
HEAT GOV reported: * WHAT...Heat index values up to 108 expected. * WHERE...Portions of central, east central, southeast, and southern Oklahoma. * WHEN...From 1 PM to 7 PM CDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
An estimated 17,303 people live within 50 km of this point.
Nearby, since 24 April 2026
- July 5, 2026 · score 34 · 17.8 km
- July 5, 2026 · score 34 · 17.8 km
- August 7, 2026 · score 34 · 19.3 km
How we know
One source: HEAT GOV. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 68 % 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) | 28 / 100 |
| Our confidence | 68% |
| Coordinates | 34.5416, -96.7358 |
| Nearest City | Ada (26 km) |
| Population Exposed | 17.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T18:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-04T13:00:00-05:00 |
| Expires | 2026-09-03T19:00:00-05:00 |
| AreaDesc | McClain; Cleveland; Pottawatomie; Seminole; Hughes; Garvin; Murray; Pontotoc; Coal; Carter; Johnston; Atoka; Love; Marshall; Bryan |
| SenderName | NWS Norman OK |
| ZonesUsedForCentroid | 8 |
| ZoneCount | 15 |
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 Ada?
Calamity.live data shows a weather event with CalamityScore 28/100, near Ada (United States), based on data from heat_gov. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.