Theophylact of Ohrid

Or else, When the higher world shall be changed, then also the lower elements shall suffer loss; whence it follows, And on the earth distress of nations, &c. As if He said, the sea shall roar terribly, and its shores shall be shaken with the tempest, so that of the people and nations of the earth there shall be distress, that is, a universal misery, so that they shall pine away from fear and expectation of the evils which are coming upon the world.