The Environment Agency calls it a matter of life or death.
Tens of thousands of homeowners in the South East who could be at risk of coastal and river flooding have not signed up to get free flood alerts.
In Kent almost a third of people living in flood risk areas have not signed up for free flood warnings. That's almost 18,000 homes.
In East Sussex 2,500 properties have not signed up, and almost 10,000 have not signed up in Essex.
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