Environment Agency064WAT1MedEstKent S London and E Sussex
Tidal Medway, Medway Estuary and Isle of Grain: flood history since 2014
The Environment Agency has issued 71 flood alerts for Tidal Medway, Medway Estuary and Isle of Grain since 13 Aug 2014, most often in February; the busiest year was 2020 (13).
Flood alerts only
The flood area
- Flood area
- Tidal Medway, Medway Estuary and Isle of Grain
- Code
- 064WAT1MedEst
- Environment Agency area
- Kent S London and E Sussex
- County
- Kent, Medway
- River or sea
- River Medway
- First in the history
- 13 Aug 2014
- Latest in the history file
- 2 Mar 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.
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 | 1 | 0 | 0 |
| 2025 | 5 | 0 | 0 |
| 2024 | 5 | 0 | 0 |
| 2023 | 7 | 0 | 0 |
| 2022 | 8 | 0 | 0 |
| 2021 | 4 | 0 | 0 |
| 2020 | 13 | 0 | 0 |
| 2019 | 7 | 0 | 0 |
| 2018 | 4 | 0 | 0 |
| 2017 | 7 | 0 | 0 |
| 2016 | 2 | 0 | 0 |
| 2015 | 6 | 0 | 0 |
| 2014 | 2 | 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 2014 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 |
|---|---|
| 2 Mar 2026 | Flood alert |
| 6 Nov 2025 | Flood alert |
| 5 Nov 2025 | Flood alert |
| 24 Oct 2025 | Flood alert |
| 30 Mar 2025 | Flood alert |
| 3 Jan 2025 | Flood alert |
| 19 Dec 2024 | Flood alert |
| 16 Nov 2024 | Flood alert |
| 7 Apr 2024 | Flood alert |
| 10 Mar 2024 | Flood alert |
| 14 Jan 2024 | Flood alert |
| 24 Nov 2023 | 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.