The map was created by Climate Central, an independent group that researches and reports on the impacts of climate change using science, technology and big data.

It indicates parts of the Norfolk Broads, north Norfolk and west Norfolk are likely to be at further risk.

Climate Central has cautioned that the map should be seen as a screening tool, noting that large datasets “always include some error”.

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The organisation advises that the map is a starting point for identifying areas requiring more detailed investigation.

A map showing areas of the Broads at risk by 2050 (Image: Climate Central) It comes as a report released by the Environment Agency found that 6.3 million properties – about one in five homes and businesses in England – are in areas at risk of river, sea and flash flooding. 

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The figures are up from 5.5 million in 2018, as the update draws on much more advanced data and modelling, including new mapping down to a 2m scale, as well as factoring in recent changes which have taken place such as new building and a worsening climate.

Demolition workers tear down Cliff Farm in Trimingham due to coastal erosion, May 10, 2024 (Image: Joe Giddens/ PA Wire) The analysis accounts for the impacts of climate change for the first time and warns it will lead to an increase in the number of properties in areas at risk from rivers and the sea or surface water to about eight million by the middle of the century – or around one in four homes and businesses.

Julie Foley, director of flood risk strategy at the Environment Agency, said: “We have spent the last few years transforming our understanding of flood and coastal erosion risk in England, drawing on the best available data from the Environment Agency and local authorities, as well as improved modelling and technological advances.

“Providing the nation with the best available information on flood and coastal erosion risk is vital to ensuring that policymakers, practitioners and communities are ready to adapt to flooding and coastal change.”

The report also highlighted north Norfolk as one of the country’s hotspots for coastal erosion. 

The assessment on coastal erosion, the first to be published since 2017, warns that 3,500 properties are in areas at risk of being lost to the sea up to 2055, a figure which rises to 32,800 if shoreline management plans for threatened areas are not delivered.