Right now
The most recent data we hold from HEAT GOV arrived 25 minutes 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 is in force until 7 September 2026, 21:00 UTC.
It is the only one we have recorded within 20 km of this point since 7 September 2026.
What the source measured
HEAT GOV reported: * WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. * WHERE...In Puerto Rico, Culebra and Vieques. In the U.S. Virgin Islands, St Croix and St. Thomas, St. John, and Adjacent Islands. * WHEN...From 10 AM t...
An estimated 52,124 people live within 50 km of this point.
How we know
One source: HEAT GOV. Not yet confirmed by a second, independent source.
Our own score for this event is 32 out of 100, at 70 % 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) | 32 / 100 |
| Our confidence | 70% |
| Coordinates | 18.2974, -65.2501 |
| Nearest City | Charlotte Amalie (34 km) |
| Population Exposed | 52.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-07T14:00:00.000Z |
| Source | http://www.weather.gov |
Score Breakdown
Technical Details
| Event | Heat Advisory |
| Urgency | Expected |
| Certainty | Likely |
| Onset | 2026-09-07T10:00:00-04:00 |
| Expires | 2026-09-07T17:00:00-04:00 |
| AreaDesc | Culebra; Vieques; St.Thomas...St. John.. and Adjacent Islands; St Croix |
| SenderName | NWS San Juan PR |
| ZonesUsedForCentroid | 1 |
| ZoneCount | 4 |
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 32/100 (VI), based on data from heat_gov. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.