OK, I will quiz you to see when would you call cut:
Could both "river water" and "sea water" be the correct literal meaning of water?
Yes.
So, when I ask: what kind of water? Could one of the answers be: gaseous water? Is it still literal? Why not?
No. Because if you point to the "gaseous water" rising from a pot of boiling water and ask someone what it is, they will answer "steam". Similarly, if you hand a person a piece of solid water and ask what it is they will answer "ice". And if you ask them why they didn't call these things "water" they will say it is because "water is a liquid".
Now, they will agree that steam (and vapour) and ice are H20 (i.e. water molecules) in a different state than liquid water and that all are convertible into each other. But this is where the basic, literal meaning of "water" differs from the scientific meaning. The scientific meaning--which refers to the chemical molecule no matter which state it is in--is not the literal meaning. Normally, we do not understand a reference to "water" to mean steam/vapour or ice.
I can imagine that your last defense would be: "the literal meaning of water has no scientific connotation in it". As a science teacher, I absolutely do not agree with that.
Insofar as liquid water is also a scientific concept, it would be wrong to say water has NO scientific connotation. But, unless one is referring to molecular structure, "water" does not have the connotation of H20 other than in its liquid state.
On this basis, I would say that no biblical reference to water can literally refer to anything other than water in its liquid state. This doesn't mean that ancient peoples were unaware of the effect of heat and cold on water, but that when water was not in its liquid state, they used terms like mist, vapour, cloud to refer to its gaseous state and ice, snow, hail to refer to its solid state.
If it is dubious exegesis to expand the literal meaning of "water" even to include steam or ice, even less can it be expanded in all the other directions you would take it. If, for example, "water" could mean "anything that contains water" it could mean anything from a tin bucket to the human body. One may as well not have any meaning for the word at all. Nor any meaning for "literal".
Words are pretty elastic as any poet or dictionary can tell you. But that elasticity has limits and the very meaning of "literal" is to set strict limits on that elasticity.
You want to turn the very meaning of "literal" inside out so that you have the freedom of a poet to use words in a broad range of metaphor--yet, unlike a poet who knows s/he is using metaphor and glorying in it--you want the right to still call your metaphors "literal".