Historic Flood Warnings and Flood Alerts
Natural Resources Wales
These datasets show all messages issued for flooding from rivers or the sea in Wales since 2006.
There are three flood warning codes:
- Flood Alert - flooding is possible; be prepared (replaced Flood Watch in 2010)
- Flood Warning - flooding is expected; take immediate action
- Severe Flood Warning - severe flooding is expected; danger to life
Environment Agency Wales provided data up until 1 April 2013. Since then, it has been provided by Natural Resources Wales.
The data is split across two Excel files. The first covers February 2006 to July 2024, when the Environment Agency’s Flood Warning System (FWS) and Floodline Warnings Direct (FWD) systems were in use. The second file contains data from July 2024 onwards, following the transition to our NRW-owned Flood Warning Information Services for Wales (FWISfW).
Live flood warnings and alerts can be viewed here.
Attribution Statement
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Please refer to the licence to understand the conditions of using this data.
- Type:
- Spatial data
- Category:
- Health
- Publication date:
- 18 December 2025
- Licence:
- Open Government Licence for Public Sector Information (OGL)
-
Copyright:
- Point of contact:
- opendata@naturalresourceswales.gov.uk
- Restrictions
- Other Restrictions
- Language
- English