> And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.

> And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:

The firmament is a space big enough to have lights. Accepting the narrative as the narrative says, rather than what people say, then there is water above the lights.