TIL about the North Sea Flood of 1953, when a night time storm surge overwhelmed sea defences in the Netherlands, north-west Belgium, and eastern England and Scotland, with a mean flood height of 5.6m/18'4" over sea level, resulting in over 2,000 deaths on land and over 200 at sea
https://en.wikipedia.org/wiki/North_Sea_flood_of_1953?repost
