Right now
The most recent data we hold from HEAT GOV arrived 25 minutes ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
This alert is in force until 6 September 2026, 08:30 UTC.
It is the 8th strongest of the 12 detections recorded within 20 km of this point since 27 April 2026. The last comparable one was on 10 July 2026.
What the source measured
HEAT GOV reported: * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 106. For the Heat Advisory, heat index values up to 101 expected. * WHERE...Boone MO, Callaway MO, Cole MO, Moniteau MO, Osage MO, Crawford MO, Gasconade MO, and Reynolds MO Counties. * WHEN...For the...
An estimated 42,595 people live within 50 km of this point.
Nearby, since 27 April 2026
- July 4, 2026 · score 39 · 13.0 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 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) | 28 / 100 |
| Our confidence | 69% |
| Coordinates | 38.4085, -91.8450 |
| Nearest City | Jefferson City (34 km) |
| Population Exposed | 42.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-06T01:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-05T20:00:00-05:00 |
| Expires | 2026-09-06T03:30:00-05:00 |
| AreaDesc | Boone; Moniteau; Cole; Osage; Callaway; Gasconade; Crawford; Reynolds |
| SenderName | NWS St Louis MO |
| ZonesUsedForCentroid | 8 |
| ZoneCount | 8 |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from heat_gov. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.