Reported by CO OPS today.
No stronger detection stands among the 818 recorded within 20 km of this point since 10 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
CO OPS reported: Water level 0.53m above predicted at Boston, MA. Observed: 1.33m, Predicted: 0.80m (MLLW datum).
The observed water level was 1.33 m, against 0.80 m predicted.
An estimated 4,688,154 people live within 50 km of this point.
Nearby, since 10 March 2026
- September 3, 2026 · score 52 · 0.0 km
- September 2, 2026 · score 39 · 0.0 km
- September 1, 2026 · score 39 · 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 52 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 | Medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 70% |
| Coordinates | 42.3539, -71.0503 |
| Nearest City | Boston (1 km) |
| Population Exposed | 4.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T16:12:00.000Z |
| Source | https://tidesandcurrents.noaa.gov/stationhome.html?id=8443970 |
Score Breakdown
Technical Details
| StationId | 8443970 |
| StationName | Boston, MA |
| ObservedM | 1.33 |
| PredictedM | 0.8 |
| SurgeM | 0.53 |
| 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 52/100, near Boston (United States), based on data from co_ops. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.