By Richard Black
Environment correspondent, BBC News website
Preparing for rising sea levels
One in six homes in England is at risk of flooding, says the Environment Agency, and climate change will raise that number without better protection.
The agency calculates that funding for projects that protect communities from flooding from rivers and the sea needs to double to £1bn annually by 2035.
Without that, it says, economic damage worth £4bn per year could be the norm.
The agency's report uses data from the government's projections of UK climate impacts, published on Thursday.
Geoff Boyd, Environment Agency: "Big decisions to be made about flood risk"
"The latest UK climate change data shows that the risk of flooding and coastal erosion will continue to increase in future due to rising sea levels and more frequent and heavy storms," said agency chairman Chris Smith.
"There are important decisions for us all to take about how to manage these risks to protect people, communities, businesses and the economy in future."
The climate impact projections - UKCP09 - concluded that every part of the UK was likely to receive more rainfall in winters - by 2080, as much as 20% more in some regions.
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