Question

How do seas cause floods?​

Answer 1

Simply put a coastal flood is when the coast is flooded by the sea. The cause of such a surge is a severe storm. The storm wind pushes the water up and creates high waves. ... A flood starts when waves move inland on an undefended coast or overtop or breach the coastal defence works like dunes and dikes.

Answer 2

Explanation:

Coastal flooding normally occurs when dry and low-lying land is submerged by seawater. ... Engineered protection structures along the coast such as sea walls alter the natural processes of the beach, often leading to erosion on adjacent stretches of the coast which also increases the risk of flooding.