Reported by EA FLOOD 169 days ago.
No stronger detection stands among the 8 recorded within 20 km of this point since 16 March 2026 — 7 others scored the same. The last comparable one was on 16 March 2026. One more was recorded here in the fortnight before it.
What the source measured
EA FLOOD reported: Groundwater flooding in upper River Ems Valley
An estimated 2,370,776 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 26, 2026 · score 46 · 0.0 km
- March 31, 2026 · score 46 · 0.0 km
- March 16, 2026 · score 46 · 0.0 km
How we know
One source: EA FLOOD. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 69 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Floods |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 69% |
| Coordinates | 50.9200, -0.2800 |
| Nearest City | Portslade (10 km) |
| Population Exposed | 2.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-20T15:22:12.000Z |
| Source | http://environment.data.gov.uk/flood-monitoring/id/floods/065FAG019 |
Score Breakdown
Technical Details
| SeverityLevel | 3 |
| FloodCategory | Flood Alert |
| County | West Sussex |
| RiverOrSea | Groundwater |
| EaAreaName | Solent and South Downs |
| FloodAreaID | 065FAG019 |
| IsTidal | false |
| TimeRaised | 2026-03-20T16:22:12 |
| TimeSeverityChanged | 2026-01-28T09:31:00 |
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 Portslade?
Calamity.live data shows a flood event with CalamityScore 46/100, near Portslade (United Kingdom), based on data from ea_flood. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.