Eastern coastal areas are being warned to prepare for possible flooding as a tidal surge combines with strong winds and high tide.
A tidal surge is caused by wind driving water towards the shore, as well as low pressure.
When strong winds combine with very low pressure they can raise the sea level in eastern England by more than two metres, according to the Environment Agency.
Tonight, a tidal surge is due to coincide with high tide which could mean water levels are as high as they were during the floods of 1953.
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After what's been the hottest day in the region for almost 10 years there are warnings tonight about the dangers of swimming in open water.
Today was the hottest day of the year so far but temperatures will be down a little tomorrow with the risk of thunder.
A sizzling day for the Anglia region with temperatures rocketing into the mid 30's.