Reported by CO OPS today.
No stronger detection stands among the 519 recorded within 20 km of this point since 10 March 2026 — 119 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
CO OPS reported: Water level 0.31m above predicted at Boston, MA. Observed: 1.74m, Predicted: 1.44m (MLLW datum).
An estimated 4,688,154 people live within 50 km of this point.
Nearby, since 10 March 2026
- August 29, 2026 · score 46 · 0.0 km
- August 28, 2026 · score 46 · 0.0 km
- August 27, 2026 · score 46 · 0.0 km
How we know
Confirmed by 2 independent sources, including CO OPS.
Our own score for this event is 46 out of 100, at 75 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Flood |
| Severity | medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 75% |
| Coordinates | 42.3539, -71.0503 |
| Nearest City | Boston (1 km) |
| Population Exposed | 4.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-30T14:30:00.000Z |
| Source | https://tidesandcurrents.noaa.gov/stationhome.html?id=8443970 |
Score Breakdown
Technical Details
| StationId | 8443970 |
| StationName | Boston, MA |
| ObservedM | 1.74 |
| PredictedM | 1.44 |
| SurgeM | 0.31 |
| Datum | MLLW |
| Google News RssFeed | flood |
| Google News SourceName | NBC Boston |
| MergedSources | [{"id":"gnews_flood_496691_34","source":"google_news","severity":"medium","severityValue":40,"timestamp":1788090904000,"latitude":42.36,"longitude":-71.06}] |
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 10 February 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.
Calamity.live data shows a flood event with CalamityScore 46/100, near Boston (United States), based on data from co_ops. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.