Warrington Flood Risk
In Warrington, 3,460 of 110,503 properties (3.1%) are in areas at high or medium risk of flooding from rivers and the sea — at least a 1 in 100 chance in any year — per Environment Agency data updated 6 July 2026; that ranks 54th of 296 local authorities in England by number.
By bandProperties in Warrington by flood-risk band
| Risk band | Chance of flooding each year | All properties | Homes |
|---|---|---|---|
| High | 3.3% (1 in 30) or greater chance in any year | 1,348 | 1,020 |
| Medium | between 1% and 3.3% (1 in 100 to 1 in 30) chance in any year | 2,112 | 1,706 |
| Low | between 0.1% and 1% (1 in 1,000 to 1 in 100) chance in any year | 9,895 | 8,638 |
| Very low | less than 0.1% (1 in 1,000) chance in any year | 532 | 437 |
2,726 of the high- or medium-risk properties are homes and 550 are non-residential. 314 postcodes in Warrington have at least one property at high or medium risk.
Postcode districtsFlood risk across Warrington
Counts are for the part of each district inside Warrington.
Recorded floodsPast floods mapped in Warrington
The Environment Agency has mapped flood outlines on 31 dates in postcode districts that mostly lie in Warrington since 1978; the most recent started on 1 Jan 2025.
1970s 1 1990s 5 2000s 17 2010s 4 2020s 4
| Started | Place / name in the record | Source of flooding | Cause | Districts |
|---|---|---|---|---|
| 1 Jan 2025 | Warrington Dallam NYE/NYD 100 outlines | Main river, drainage | Local drainage/surface water | WA1 WA13 WA2 WA3 WA4 WA5 WA55 |
| 9 Apr 2024 – 10 Apr 2024 | Warrington Bottle Gas | Main river | Channel capacity exceeded (no raised defences) | WA55 |
| 20 Oct 2023 – 23 Oct 2023 | Northwich Barn Lake Farm, Lake Lane 2 outlines | Drainage | Local drainage/surface water | WA3 WA4 |
| 20 Jan 2021 | Warrington Callands 24 outlines | Main river, other | Channel capacity exceeded (no raised defences) | WA2 WA5 WA55 |
| 28 Jul 2019 – 31 Jul 2019 | HEATLEY | Main river | Channel capacity exceeded (no raised defences) | WA13 |
| 15 Jun 2016 – 16 Jun 2016 | — 3 outlines | Drainage | Local drainage/surface water | WA3 |
| 26 Dec 2015 | Lymm 2 outlines | Ordinary watercourse | Channel capacity exceeded (no raised defences) | WA13 |
| 5 Dec 2013 | FerryInn 8 outlines | Ordinary watercourse | Channel capacity exceeded (no raised defences) | WA1 WA5 WA55 |
| 5 Sep 2008 – 6 Sep 2008 | Dallam Brook | Drainage | Local drainage/surface water | WA2 |
| 21 Jan 2008 – 22 Jan 2008 | Longford Brook Orford, Che 2 outlines | Main river | Not recorded | WA2 WA3 |
| 10 Jan 2008 – 11 Jan 2008 | Drain HighamAve | Drainage | Local drainage/surface water | WA55 |
| 4 Mar 2006 – 5 Mar 2006 | Mersey Estuary FerryInn | Ordinary watercourse | Overtopping of defences | WA5 |
| 10 Aug 2004 – 11 Aug 2004 | Bradley Brook HattonArms | Drainage | Local drainage/surface water | WA4 |
| 10 Aug 2002 – 11 Aug 2002 | — | Not recorded | Not recorded | WA2 |
| 9 Aug 2002 – 10 Aug 2002 | — | Not recorded | Not recorded | WA13 |
| 25 Feb 2002 – 26 Feb 2002 | Dallam Brook EddieStobart | Not recorded | Not recorded | WA2 |
| 1 Feb 2002 – 2 Feb 2002 | Mersey Estuary Warrington 3 outlines | Not recorded | Operational failure/breach of defence | WA55 |
| 31 Jan 2002 – 1 Feb 2002 | — 5 outlines | Other | Overtopping of defences | WA5 WA55 |
| 15 May 2001 – 16 May 2001 | — 2 outlines | Not recorded | Channel capacity exceeded (no raised defences) | WA2 WA55 |
| 7 Apr 2001 – 8 Apr 2001 | — 2 outlines | Not recorded | Other | WA2 WA5 |
| 16 Nov 2000 – 17 Nov 2000 | — 4 outlines | Not recorded | Other | WA13 WA2 WA55 |
| 30 Oct 2000 – 31 Oct 2000 | Penketh Brook Penketh | Main river | Channel capacity exceeded (no raised defences) | WA5 |
| 28 Oct 2000 – 29 Oct 2000 | — 24 outlines | Main river, ordinary watercourse | Channel capacity exceeded (no raised defences) | WA2 WA55 |
| 10 Oct 2000 – 11 Oct 2000 | — 3 outlines | Not recorded | Other | WA2 WA5 |
| 3 Jun 2000 – 4 Jun 2000 | — 3 outlines | Not recorded | Other | WA5 WA55 |
| 23 Dec 1999 – 24 Dec 1999 | — | Not recorded | Channel capacity exceeded (no raised defences) | WA55 |
| 23 Oct 1998 – 24 Oct 1998 | — | Not recorded | Channel capacity exceeded (no raised defences) | WA13 |
| 24 Dec 1997 – 25 Dec 1997 | — | Not recorded | Obstruction/blockage - channel | WA5 |
| 10 Oct 1997 – 11 Oct 1997 | — | Not recorded | Not recorded | WA5 |
| 26 Feb 1990 – 27 Feb 1990 | — 5 outlines | Ordinary watercourse | Channel capacity exceeded (no raised defences) | WA1 WA5 WA55 |
| 28 Dec 1978 – 29 Dec 1978 | — 10 outlines | Main river | Not recorded | WA2 WA55 |
What this page shows, and what it misses
The Environment Agency's count of properties in each postcode that sit in areas of land at very low, low, medium or high risk of flooding from rivers and the sea, allowing for flood defences and their condition, added up here by postcode district and local authority. Every property in England is counted once, so the share is of all properties in the area.
It misses: surface water (heavy rain), groundwater, sewer and reservoir flooding; Wales, Scotland and Northern Ireland; and anything about a single building. A band describes the land a property stands on, not its floor level or flood protection, so it is not a forecast for any one home. Past floods come from the EA's Recorded Flood Outlines and are placed in the postcode district whose centre is nearest (within 12 km), so a flood near a boundary can be listed under a neighbour. Older records are patchy, and a flood with no outline is not listed.
"Warrington" means the local authority area (ONS code E06000007), not only the town centre.
If you live in Warrington
- Check your own address on gov.uk; it also covers surface water.
- Sign up for free flood warnings: gov.uk/get-flood-warnings. Floodline: 0345 988 1188.
- What is in force now: flood warnings UK · river levels.
- Never walk or drive through flood water: why shallow water kills.
FAQQuestions people ask
Is Warrington at risk of flooding?
In Warrington, 3,460 of 110,503 properties (3.1%) are in areas at high or medium risk of flooding from rivers and the sea — at least a 1 in 100 chance in any year — per Environment Agency data updated 6 July 2026; that ranks 54th of 296 local authorities in England by number.
Which parts of Warrington have the most properties at flood risk?
Postcode district WA5 has the most: 1,542 properties at high or medium risk (5.1% of its properties in Warrington). The table on this page lists every district.
When did Warrington last flood?
The Environment Agency has mapped flood outlines on 31 dates in postcode districts that mostly lie in Warrington since 1978; the most recent started on 1 Jan 2025.
Does this include surface water flooding?
No. These counts cover flooding from rivers and the sea only. Surface water (heavy rain) flooding affects more properties in England; check it for one address on gov.uk's long-term flood risk service.
Flood risk counts: Environment Agency, Risk of Flooding from Rivers and Sea – Postcodes in Areas at Risk and Recorded Flood Outlines, used under the Open Government Licence v3.0. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this information are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.
Local authority of each postcode: Office for National Statistics postcode lookup (May 2026), licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. District centres and place names: postcodes.io (ONS/OS open data). Totals, ranks and grouping are Global Incident Tracker's own calculations; the Environment Agency does not endorse them.