Right now
The most recent data we hold from CO OPS arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
85 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by CO OPS today.
It is the strongest of the 1174 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 6 September 2026.
What the source measured
CO OPS reported: Water level 2.79m above predicted at Boston, MA. Observed: 3.36m, Predicted: 0.57m (MLLW datum).
The observed water level was 3.36 m, against 0.57 m predicted.
An estimated 4,688,154 people live within 50 km of this point.
Nearby, since 10 March 2026
- September 6, 2026 · score 52 · 0.0 km
- September 5, 2026 · score 52 · 0.0 km
- September 4, 2026 · score 52 · 0.0 km
How we know
One source: CO OPS. Not yet confirmed by a second, independent source.
Our own score for this event is 74 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 | Floods |
| Severity | Critical |
| Calamity Score (ours) | 74 / 100 |
| Our confidence | 70% |
| Coordinates | 42.3539, -71.0503 |
| Nearest City | Boston (1 km) |
| Population Exposed | 4.7M within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-09-07T00:00:00.000Z |
| Source | https://tidesandcurrents.noaa.gov/stationhome.html?id=8443970 |
Score Breakdown
Technical Details
| StationId | 8443970 |
| StationName | Boston, MA |
| ObservedM | 3.36 |
| PredictedM | 0.57 |
| SurgeM | 2.79 |
| Datum | MLLW |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 Boston?
Calamity.live data shows a flood event with CalamityScore 74/100, near Boston (United States), based on data from co_ops. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.