Story on the back:

"The flying saucers’ powers seemed unlimited. Able to destroy any building or human with a blast from its death rays, the Martian ships now turned their terror to the sea. Rays flashed over the oceans of world and calm waters suddenly became turbulent. Waves crashed against the shores, building in momentum and size under the strange Martian power. Finally reaching mammoth proportions, immense tidal waves crashed furiously into shore cities. Sea vessels were tossed through the city streets by the powerful waves. Huge buildings toppled under the pressure of the erupting waters, and the streets vanished under the twisting sea."