Environment Agency013WATMEWGtr Mancs Mersey and Ches
Mersey Estuary at Warrington: flood history since 2015
The Environment Agency has issued 171 flood alerts for Mersey Estuary at Warrington since 21 Mar 2015, most often in October; the busiest year was 2016 (29). The history file ends in June 2026; AreaZine's record of the live feed adds 1 since 1 July 2026.
Flood alerts only
The flood area
- Flood area
- Mersey Estuary at Warrington
- Code
- 013WATMEW
- Environment Agency area
- Gtr Mancs Mersey and Ches
- County
- Halton, Warrington
- River or sea
- Mersey Estuary
- First in the history
- 21 Mar 2015
- Latest in the history file
- 18 Apr 2026
- Latest in AreaZine's record
- Flood alert, 29 Sep 2026
- 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.
The latest: since 1 July 2026, in AreaZine's record of the live feed
| Date | Level |
|---|---|
| 29 Sep 2026 | Flood alert |
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 |
|---|---|---|---|
| 2026 | 4 | 0 | 0 |
| 2025 | 8 | 0 | 0 |
| 2024 | 9 | 0 | 0 |
| 2023 | 8 | 0 | 0 |
| 2022 | 14 | 0 | 0 |
| 2021 | 7 | 0 | 0 |
| 2020 | 14 | 0 | 0 |
| 2019 | 21 | 0 | 0 |
| 2018 | 15 | 0 | 0 |
| 2017 | 16 | 0 | 0 |
| 2016 | 29 | 0 | 0 |
| 2015 | 26 | 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 2015 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 |
|---|---|
| 18 Apr 2026 | Flood alert |
| 4 Apr 2026 | Flood alert |
| 20 Feb 2026 | Flood alert |
| 4 Feb 2026 | Flood alert |
| 5 Dec 2025 | Flood alert |
| 7 Oct 2025 | Flood alert |
| 6 Oct 2025 | Flood alert |
| 7 Sep 2025 | Flood alert |
| 26 May 2025 | Flood alert |
| 27 Apr 2025 | Flood alert |
| 29 Mar 2025 | Flood alert |
| 1 Mar 2025 | 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.