The Torah's "a mist went up from the earth" becomes, in Targum Pseudo-Jonathan on (Genesis 2:6), something far grander. "A cloud of glory descended from the throne of glory, and was filled with waters from the ocean, and afterward went up from the earth, and gave rain to come down and water all the face of the ground."
This is not weather. It is a pilgrimage. A cloud leaves the divine throne, descends to the ocean, fills itself, rises, and falls as rain. The world's first irrigation is routed through heaven itself. The Targumist is setting a pattern. Every drop of water that falls on a field traces back, in some hidden sense, to the throne of glory. Rain is sacred hydrology.
The same cloud will reappear later, leading Israel through the wilderness — the ananei ha-kavod, the clouds of glory that sheltered them for forty years (Exodus 13:21). The Targumist wants us to see that those wilderness clouds were not improvised. They had been doing this work since the first week of the world.