I also didn’t say anything about rain being before the flood according to the bible authors. You apparently misunderstood something else there. It does plainly state in the bible however that the “windows of heaven were opened” to provide much of the water for the flood.

The bible authors from the old testament to the end of the new testament believed that the waters you talk about were up there above what they thought was the solid sky dome of the sky keeping them up there. Like other ancient peoples, being unaware of evaporation and condensation, etc… this was their primitive way of explaining where water and clouds came from when it rained, hence the references all through the bible about the sky being “shut” and “opened” to let water and other things through.

If you had read the whole article you would have seen all of the biblical references I list on these things. BTW, this isn’t my idea, this is standard non-apologetic information. Only fundamentalist try to claim the bible authors somehow had modern day knowledge about these things and they hold no credibility in the scientific community.

Your assertion about a layer of water above the earth is a good example. If there was ever a layer of water somehow being held above the earth as creationists/ID people claim, it would have had an effect on the air pressure, but not a good effect. The water would have exerted so much pressure on the air below it that the air pressure would have been as great as it is on the planet Venus which has crushed every probe that has attempted to land on it like an empty beer can. All humans would have been killed very quickly. None of this sort of nonsense ever makes it past scientific peer review.

However the bible authors definitely described a solid solid sky dome, again just like most other primitive ancient people believed.
There’s no reason to believe the Biblical authors had any special advanced knowledge of science. They believed pretty much the same things other cultures did in their day (flat earth with “ends” set on pillars, water leaking out of sluice gates in the sky, etc…) and this is very obvious in the scriptural references.