Adam Clarke on Ezekiel 13:11

There shall be an overflowing shower - That shall wash off this bad mortar; sweep away the ground on which the wall stands, and level it with the earth. In the eastern countries, where the walls are built with unbaked bricks, desolations of this kind are often occasioned by tempestuous rains. Of this sort of materials were the walls of ancient cities made, and hence the reason why no vestige of them remains. Witness Babylon, which was thus built. See the note on Eze 4:1.