Emergency planning reservoir flood maps are available on GOV.UK. These show:
- the maximum area that could be flooded in the event of a 'worst case' reservoir failure
- the consequences of reservoir flooding but not the likelihood of the risk of flooding.
What to do in a reservoir flooding emergency
In an emergency, phone 999 or the Environment Agency’s Emergency hotline on: 0800 807060.
You can also find advice about what to do before, during and after a flood on our Flooding advice page.
Off-site emergency plan
We are responsible, together with our Sussex Resilience Forum partners, for co-coordinating and preparing off-site emergency plans. This includes warning and informing communities about reservoir failure and flooding.
The forum has developed a reservoirs' generic off-site plan together with reservoir owners (undertakers), who are responsible for on-site plans.
This makes sure arrangements between undertakers and the emergency responders are suitably aligned.