According to the Environment Agency, over five million people in England live and work in properties at risk of flooding from rivers or the sea, whilst more face flood threats from groundwater, surface water, sewers, and reservoirs.
In extreme conditions you won’t be able to stop flood water, and you should always put personal safety above attempts to protect property and possessions. Despite this, there are steps that you can take to keep water out, to buy yourself time to preserve property and possessions, and to limit the damage that flood water does.
Gocompare have put together a guide to prepare for a flood and to protect your property – https://www.gocompare.com/home-insurance/limiting-flood-risk-and-damage/