Makes the water movement of the tide in a narrow strip of coastal land seem extreme

The correct answer is this one: tidal bore. Tidal Bore makes the water movement of the tide in a narrow strip of coastal land seem extreme. Tidal bore is a tidal phenomenon in which the leading edge of the incoming tide forms a wave (or waves) of water that travels up a river or narrow bay against the direction of the river or bay's current.

Probably north korea if your family has decided to use only nuclear power.