Gregory the Great
Catena Aurea · Lukasevangelium 21
But when ye shall hear of wars and commotions, be not terrified: for these things must first come to pass; but the end is not by and by. Then said he unto them, Nation shall rise against nation, and kingdom against kingdom: And great earthquakes shall be in divers places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven.
(in Hom. 35.) Look at the vicissitudes of bodies. And famine. Observe the barrenness of the ground. And fearful sights and great signs there shall be from heaven. Behold the variableness of the climate, which must be ascribed to those storms which by no means regard the order of the seasons. For the things which come in fixed order are not signs. For every thing that we receive for the use of life we pervert to the service of sin, but all those things which we have bent to a wicked use, are turned to the instruments of our punishment.