Right now
The most recent data we hold from HEAT GOV arrived 12 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 18:00 UTC. It is kept here as a record.
It is the 18th strongest of the 26 detections recorded within 20 km of this point since 26 April 2026. The last comparable one was on 7 August 2026.
What the source measured
HEAT GOV reported: * WHAT...Heat index values up to 107 expected. * WHERE...Delaware and Ottawa Counties. * WHEN...From noon today to 7 PM CDT this evening. * IMPACTS...Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.
Nearby, since 26 April 2026
- June 22, 2026 · score 34 · 16.0 km
- August 7, 2026 · score 39 · 16.3 km
- August 7, 2026 · score 22 · 19.9 km
How we know
One source: HEAT GOV. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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) | 16 / 100 |
| Legacy data-support index | 0.50/1 |
| Coordinates | 36.6507, -94.8340 |
| Nearest City | Bella Vista (54 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-14T17:00:00.000Z |
| 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: 2026-09-14T17:00:00.000Z.
First archived: 2026-09-14T13:51:04.466Z. 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 | 2026-09-14T13:00:00-05:00 |
| AreaDesc | Ottawa; Delaware |
| SenderName | NWS Tulsa OK |
| ZonesUsedForCentroid | 2 |
| ZoneCount | 2 |
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.
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