John Gills Exposition of the Bible Commentary - Genesis 19:24
Then the Lord rained upon Sodom, and upon Gomorrah, brimstone and fire from the Lord out of heaven. And not upon those two cities only, but upon Admah and Zeboiim also, see Deuteronomy 29:23 ; this was not a common storm of thunder and lightning, with which often there is a smell of sulphur or brimstone; but this was a continued shower of sulphurous fire, or of burning flaming brimstone, which at once consumed those cities and the inhabitants of them; and the land adjacent being... read more
Matthew Henry's Complete Commentary - Genesis 19:24-25
Then, when Lot had got safely into Zoar, then this ruin came; for good men are taken away from the evil to come. Then, when the sun had risen bright and clear, promising a fair day, then this storm arose, to show that it was not from natural causes. Concerning this destruction observe, 1. God was the immediate author of it. It was destruction from the Almighty: The Lord rained?from the Lord (Gen. 19:24), that is, God from himself, by his own immediate power, and not in the common course of... read more