23 And Moses stretched forth his rod toward heaven: and the Lord sent thunder and hail, and the fire ran along upon the ground; and the Lord rained hail upon the land of Egypt. 24 So there was hail, and fire mingled with the hail, very grievous, such as there was none like it in all the land of Egypt since it became a nation. 25 And the hail smote throughout all the land of Egypt all that was in the field, both man and beast; and the hail smote every herb of the field, and brake every tree of the field. 26 Only in the land of Goshen, where the children of Israel were, was there no hail.
It was not only hail that afflicted the Egyptians, but fire as well! The nature of this fire is rather mysterious. It was not mentioned in God’s foretelling of the curse, and we never have explained to us exactly what connection it had to the hail. They are a most strange combination, as they would seem likely to extinguish and melt one other!
Of course, we are not told that the fire was raining down from heaven. The passage says it “ran along upon the ground” and “mingled with the hail.” Perhaps the hail knocked something over which spilled embers or hot coals and spread a fire over the land. Or, the fire might have been lightning which accompanied the same storm that brought the hail. Maybe there was lightning, but it started an actual fire on the ground. Some readers have even posited that the tongues of flame might have literally burst out from the hail in some way!
In any case, and in whatever manner, it seems clear that there was both a severe pummeling of hail and an intense heat as well. A truly devastating wonder this was, and such a terrible fate must have befallen those who still stood out in the fields!
How does this curse represent the ill effects of sin? One way that stands out to me is that this curse was focused on destroying all that was vulnerable and exposed. It is always the weak and defenseless who are first victimized to satisfy the selfish sins of others. Eventually the mighty will fall, too, but they land upon the broken bodies of the small and innocent that went before.