Right now
The most recent data we hold from HEAT GOV arrived 3 minutes ago, and this point is in it.
One other detection within 20 km in the last 24 hours, 9 km from here.
This alert is in force until 9 September 2026, 00:00 UTC.
It is the 10th strongest of the 23 detections recorded within 20 km of this point since 23 April 2026. The last comparable one was on 7 September 2026.
What the source measured
HEAT GOV reported: * WHAT...Heat index values up to 107 expected. * WHERE...Portions of southwest Iowa and southeast Nebraska. * WHEN...From 1 PM to 7 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
An estimated 294,757 people live within 50 km of this point.
Nearby, since 23 April 2026
- July 4, 2026 · score 43 · 8.1 km
- September 7, 2026 · score 37 · 8.7 km
- June 11, 2026 · score 67 · 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 37 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) | 37 / 100 |
| Our confidence | 68% |
| Coordinates | 40.5545, -96.2523 |
| Nearest City | Lincoln (45 km) |
| Population Exposed | 294.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-08T18:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-08T13:00:00-05:00 |
| Expires | 2026-09-08T19:00:00-05:00 |
| AreaDesc | Mills; Montgomery; Fremont; Page; Lancaster; Cass; Otoe; Saline; Jefferson; Gage; Johnson; Nemaha; Pawnee; Richardson |
| SenderName | NWS Omaha/Valley NE |
| ZonesUsedForCentroid | 7 |
| ZoneCount | 14 |
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 37/100 (United States), based on data from heat_gov. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.