Lives are at risk as a huge 'mound of water' heads towards the Lincolnshire coast, say weather forecasters.
The 80mph gales are causing a tidal surge along the East coast.
The Environment Agency has issued severe flood warnings and coastal flood warnings, meaning there is an imminent danger to life.
“High tides and high waves mean a storm surge is developing along the north sea coast in particular." said a BBC forecaster.
"The wind is blowing almost parallel to the North Sea coastline. That means that a mound of water is heading in the direction of Lincolnshire.
"Potential evacuations are likely along some of these coastlines.”
Forecasters said surges begin when a rising area of low pressure takes pressure off the surface of the sea, allowing it "bulge" upwards.
As that pulls away, you get very strong winds on the back edge of the low pressure, and then that shoves that bulge of high sea levels down through the North Sea.