" And it is said that extraordinary rains generally dash down after great battles, whether it is that some divine power drenches and hallows the ground with purifying waters from Heaven, or that the blood and putrefying matter send up a moist and heavy vapour which condenses the air, this being easily moved and readily changed to the highest degree by the slightest cause. "

― Plutarch , Complete Works of Plutarch (Delphi Ancient Classics)