Environment Agency061FWB23TrowlockThames
River Thames at Trowlock Island: flood history since 2012
The Environment Agency has issued 12 flood alerts and 1 flood warning for River Thames at Trowlock Island since 4 May 2012, most often in March; the busiest year was 2013 (8).
Flood warnings on record
The flood area
- Flood area
- River Thames at Trowlock Island
- Code
- 061FWB23Trowlock
- Environment Agency area
- Thames
- County
- Greater London, Richmond upon Thames
- River or sea
- River Thames
- First in the history
- 4 May 2012
- Latest in the history file
- 25 Dec 2013
- Current status
- check-for-flooding.service.gov.uk (the Environment Agency's live page)
Flood alert, flood warning, severe flood warning: what each means
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.
How many alerts and warnings a year?
Flood alerts, flood warnings and severe flood warnings (updates not counted), by year. 2026 runs to the end of June.
The numbers
| Year | Alerts | Warnings | Severe |
|---|---|---|---|
| 2013 | 7 | 1 | 0 |
| 2012 | 5 | 0 | 0 |
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.
When in the year?
All alerts and warnings since 2012 by month.
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.
Before July 2026: the latest in the history file
| Date | Level |
|---|---|
| 25 Dec 2013 | Flood warning |
| 26 Mar 2013 | Flood alert |
| 11 Mar 2013 | Flood alert |
| 10 Mar 2013 | Flood alert |
| 11 Feb 2013 | Flood alert |
| 2 Feb 2013 | Flood alert |
| 27 Jan 2013 | Flood alert |
| 12 Jan 2013 | Flood alert |
| 25 Dec 2012 | Flood alert |
| 14 Dec 2012 | Flood alert |
| 26 Nov 2012 | Flood alert |
| 17 Oct 2012 | Flood alert |
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.