'Sky' in the Bible

And God said, “Let there be an expanse [of the sky] in the midst of the waters, and let it separate the waters [below the expanse] from the waters [above the expanse].”

and let them be useful as lights in the expanse of the heavens to provide light on the earth”; and it was so, [just as He commanded].

The waters prevailed so greatly and were so mighty and overwhelming on the earth, so that all the high mountains everywhere under the heavens were covered.

Also the fountains of the deep [subterranean waters] and the windows of the heavens were closed, the [pouring] rain from the sky was restrained,

They said, “Come, let us build a city for ourselves, and a tower whose top will reach into the heavens, and let us make a [famous] name for ourselves, so that we will not be scattered [into separate groups] and be dispersed over the surface of the entire earth [as the Lord instructed].”