It is the Vale of Glamorgan Council's responsibility to take reasonable steps to prevent water from running off the adopted highway onto private property


However, remember flooding is a natural occurrence and no drainage system or flood protection measures can give absolute protection from all flooding events.


The emergency response to flooding falls primarily to the emergency services working with the local authority. We coordinate evacuation, and as a last resort we can provide emergency temporary accommodation and other social services.



Community Resilience 

To help improve the resilience of the communities in the Vale of Glamorgan, the Council have worked with our partners and produced a Community Flood Plan and Extreme Weather Guidance. The document below contains guidance on extreme weather and how to prepare a Community Flood Plan, this can be completed by households and as a community or flood group.

 Community Flood Plan & Extreme Weather Guidance





Response to Flooding on 23 December 2020

On 23 December 2020, the Vale of Glamorgan experienced on average 33mm of rainfall over an 11hour period. During this intense rainfall a number of properties across the authority experienced internal flooding, in particular houses in Dinas Powys, Sully and Penarth.


As a lead Local Flood Authority, we have a statutory duty to log all instances of flooding and investigate where necessary. 


Under Section 19 of the Flood and Water Management Act 2010, Vale of Glamorgan Council, as the Lead Local Flood Authority (LLFA), have a duty to investigate and publish reports on flood events that occur within its area to the extent that it considers it necessary or appropriate. A section 19 flood investigation report is a public statement of the circumstances of a flood event and what parties have a role in managing the risks. The Council has appointed a specialist consultant to assist in investigating the flooding as part of the section 19 report.


The flood investigation reports will consider:

  • Background information on location of flooding

  • Summary of rainfall event, information on the extent of flooding

  • Investigation findings

  • The roles and responsibilities of each RMA

  • Recommended actions following the investigation.


As part of our response to the flooding incident on the 23 December, we have been working in partnership with Natural Resources Wales and Welsh Water to investigate areas, in particular Dinas Powys where a large number of properties were affected by main river flooding.


Flooding Incident Form

Due to the high number of flooding incidents and the impact of Covid affecting our ability to investigate we will be letter dropping all residents who live within the flooding areas to ask them to complete a Flooding Incident Form


Complete Flooding Incident Form Online



Please return completed forms to:


Environment Team

The Alps Depot

Alps Quarry Road
CF5 6AA.


Please note: Any information we gather over the course of our investigations will be shared with Welsh Water and Natural Resources Wales.


For further information regarding assistance or advice to residents in relation to flood insurance please visit:

Report Flooding on a Highway

If a highway in the Vale of Glamorgan has flooded please contact us:

24-hour Floodwatch

Natural Resources Wales has a 24-hour floodwatch and flood line number:

  • 0845 988 1188

Property Already Flooded

If water is already flooding your property, please contact the Fire Service:

  • 999

Ruptured Water Main

If flood is caused by a burst water main contact Dŵr Cymru Welsh Water:

  • 0800 085 3968

Please note: If you want to report an overflowing public foul and surface water sewer please call the relevant water company; they manage their own network of public foul and surface water sewers.


Owner or Occupier of Property

The first responsibility for protection of property in the event of flooding lies with the owner or occupier of the property. The owner or occupier is also responsible for any subsequent losses, repairs or remedial measures necessary.


Owners or occupiers living near water courses or adjoining areas / fields which give rise to excessive water run-off should take appropriate precautions in advance of a forecast of bad weather as highway drainage systems are not designed for and cannot cope with, run-off from adjoining fields.


For more information on Planning, Managing and Recovering from a Flood please see the links below.