The North Sea is the shelf sea between Great Britain in the West and continental Europe in the East and South. It has strong tidal movements, and is prone to storm surges that occur when north-westerly winds whip the sea against the continental coast. The most severe surges tend to arise when storms combine with spring tides, during which the sun, moon and earth are all lined up to maximize the gravitational pull on the water. The coastal people have long fought and laboured to protect their ...