What is a tidal surge?

People watch waves pound the sea wall at Gorleston-on-Sea, as a tidal surge hits the east coast of England in 2007. Credit: PA Images

Eastern coastal areas are being warned to prepare for possible flooding as a tidal surge combines with strong winds and high tide.

People watch waves pound the sea wall at Gorleston-on-Sea, Norfolk as a tidal surge hits the east coast of England in 2007. Credit: PA Images

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.

Read more: Flood warnings across the East

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What is a tidal surge?

The worst coastal surge in more than 60 years could lead to "significant" flooding of coastal areas, officials have warned.