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Why was the Delta Project built in the Netherlands?

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Physical map of Western and Central Europe highlighting the drainage basins and networks of the Rhine, Rhone, and Seine rivers. The map shows river courses, major tributaries, canals, elevation changes with color shading, international boundaries, and key cities such as Paris, Lyon, Basel, and Rotterdam. A locator inset in the upper left corner places the main map within Europe.
Rhine River

The Delta Project, also known as the Delta Works, was built in the Netherlands as a massive flood-control initiative to protect the country from the destructive power of the North Sea.12

The project gained urgent necessity following a catastrophic North Sea flood on February 1, 1953. This disaster, caused by a severe storm surge, resulted in 1,836 deaths and devastated vast areas of land in the southwestern Netherlands. The regionā€™s existing dike system had been weakened during World War II, leaving the coastline highly vulnerable.12

By constructing a series of dams and closing off the estuaries of the Rhine, Meuse, and Schelde rivers, the project successfully shortened the vulnerable coastline by 700 km. This engineering feat dramatically reduced the length of dikes exposed to the sea and was designed to lower the threat of future flooding to a probability of once per 4,000 years.12