300 Foxes and a Donkey's Jawbone
Can we make the case that the phrase "When He strengthened the fountains of the deep," means "sealed shut with lava or magma?" We'll need to look at other passages where the word translated as strengthened occurs.
The context of the mist that went up is important. It's part of the narrative of the week of creation when the fountains of the great deep had to be sealed after the deep had drained through them into the interior of the Earth.
Contextually the mist that went up was a phenomenon which happened during the week of creation, specifically on the third day. However, in conservative Christian doctrine this condition persisted until the time of Noah.