Storm tides of the North Sea

On 14 December 1287, St. Lucia's flood affected the Netherlands and Germany killing more than 50,000 people in one of the most destructive floods in recorded history.[30] The St. Elizabeth flood of 1421 and the mismanagement in its aftermath destroyed a newly reclaimed polder, replacing it with the 72-square-kilometre (28 sq mi) Biesbosch tidal floodplains in the south-centre. The last major flood in the Netherlands took place in early February 1953, when a huge storm caused the collapse of several dikes in the southwest of the Netherlands. More than 1,800 people drowned in the ensuing inundations. The Dutch government subsequently decided on a large-scale program of public works (the "Delta Works") to protect the country against future flooding. The project took more than thirty years to complete.

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