FloodsLast updated: 07 January 2013 11:01 UK
The most notable flooding of Portsmouth occurred on 15 September 2000 with widespread disruption across the city. The incident has been recorded as in excess of a 1 in 100 year event. Although events like this are rare we still need to be prepared to respond to the risk of flooding at all times.
Surface Water Flooding
The majority of flooding in Portsmouth is caused by heavy rainfall events creating more flow than the drainage system can cope with. Due to the nature of surface water flooding it is very difficult to predict when it will occur. This makes providing accurate and timely warnings very difficult. The recently completed Surface Water Management Plan has allowed us to identify and prioritise the areas at greatest risk. More information on surface water flooding can be found via the drainage team page.
Coastal FloodingPortsmouth is susceptible to coastal flooding but it is relatively easy to predict. When the Environment Agency warns of tidal flood the council deploys floodgates and flood boards in Old Portsmouth. More information on coastal flooding can be found via the coastal defense page.
Burst Water MainThe water supply company for the city is Portsmouth Water. They are responsible for all pipe work up to and including the stopcock. To report a burst water main they should be contacted on 0800 434 610. For smaller leaks please use their online Report a Leak form.
We receive weather warnings from the Met Office Severe Weather Warning Service which lets us to act as quickly as possible to any potential flooding event.
The Environment Agency has recently made it easier for residents to receive flood warnings with their new Facebook app. The app allows users to automatically receive flood alert for their area and view those in other regions. The Floodline service which allows residents to register for flood warnings by calling 0845 988 1188 will also continue to run.
We suggest all residents located within Flood Zones complete a Flood Plan. The plan collects into one place the essential information you will need in the unlikely event you are flooded. This will help you make the right decisions before and after a flood. If you would like any assistance with your flood plan please contact us using the information on our main drainage page or contact the EA Floodline on 0845 988 1188.