Environment Agency013WATMEFormer flood area
Mersey Estuary from Liverpool to Warrington: flood history since 2006
The Environment Agency has issued 84 flood alerts for Mersey Estuary from Liverpool to Warrington since 29 Mar 2006, most often in February; the busiest year was 2014 (33).
Flood alerts only
The flood area
- Flood area
- Mersey Estuary from Liverpool to Warrington
- Code
- 013WATME
- Environment Agency area
- none today (the history file lists it under NW - South)
- First in the history
- 29 Mar 2006
- Latest in the history file
- 23 Feb 2015
- Current status
- no longer an Environment Agency flood area (not in its register of 1 Oct 2026)
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 |
|---|---|---|---|
| 2015 | 9 | 0 | 0 |
| 2014 | 33 | 0 | 0 |
| 2013 | 14 | 0 | 0 |
| 2012 | 13 | 0 | 0 |
| 2011 | 15 | 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 2006 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 |
|---|---|
| 23 Feb 2015 | Flood alert |
| 22 Feb 2015 | Flood alert |
| 22 Feb 2015 | Flood alert |
| 21 Feb 2015 | Flood alert |
| 20 Feb 2015 | Flood alert |
| 20 Feb 2015 | Flood alert |
| 19 Feb 2015 | Flood alert |
| 23 Jan 2015 | Flood alert |
| 22 Jan 2015 | Flood alert |
| 24 Dec 2014 | Flood alert |
| 23 Dec 2014 | Flood alert |
| 7 Nov 2014 | 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.