![storm surges combine with a high spring tide cause big waves.](http://static.sciencelearn.org.nz/images/images/000/000/107/full/1934867619_2f85f052a0_o.jpg?1674163708)
When storm surges combine with a high spring tide, the resulting waves can overtop the coastline. This causes flooding by seawater.
When storm surges combine with a high spring tide, the resulting waves can overtop the coastline. This causes flooding by seawater.