This alert is in force until 5 September 2026, 05:30 UTC.
It is the 7th strongest of the 12 detections recorded within 20 km of this point since 4 April 2026. The last comparable one was on 17 August 2026.
What the source measured
HEAT GOV reported: * WHAT...Heat index values between 105 and 109 expected. * WHERE...In Arkansas, Benton and Carroll Counties. In Oklahoma, Northern Sequoyah, Adair, Choctaw, and Pushmataha Counties. * WHEN...From noon to 7 PM CDT Saturday. * IMPACTS...Heat related illnesses are possible especially impacting th...
An estimated 111,275 people live within 50 km of this point.
Nearby, since 4 April 2026
- July 6, 2026 · score 43 · 20.4 km
- June 8, 2026 · score 43 · 21.7 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 | 35.4186, -94.6862 |
| Nearest City | Fort Smith (26 km) |
| Population Exposed | 111.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-05T17:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-05T12:00:00-05:00 |
| Expires | 2026-09-05T00:30:00-05:00 |
| AreaDesc | Benton; Carroll; Pushmataha; Choctaw; Adair; Northern Sequoyah |
| SenderName | NWS Tulsa OK |
| ZonesUsedForCentroid | 6 |
| ZoneCount | 6 |
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 Fort Smith?
Calamity.live data shows a weather event with CalamityScore 37/100, near Fort Smith (United States), based on data from heat_gov. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.