Yes. There are waters above the firmament because it is written (Genesis 1:7), "(God) divided the waters that were under the firmament, from those that were above the firmament", and I answer with Augustine (Gen. ad lit. ii, 5) that, "These words of Scripture have more authority than the most exalted human intellect. Hence, whatever these waters are, and whatever their mode of existence, we cannot for a moment doubt that they are there."
Aquae sunt supra firmamentum quod dicitur Gen. I, quod "divisit aquas quae erant supra firmamentum, ab his quae erant sub firmamento" et respondeo dicendum quod, sicut dicit Augustinus, II super Gen. ad Litt., "maior est Scripturae huius auctoritas quam omnis humani ingenii capacitas. Unde quomodo et quales aquae ibi sint, eas tamen ibi esse, minime dubitamus."
1. If by the firmament we understand the starry heaven, and as being of the nature of the four elements, for the same reason it may be believed that the waters above the heaven are of the same nature as the elemental waters.
Si enim per firmamentum intelligitur caelum sidereum quod ponitur esse de natura quatuor elementorum, pari ratione et aquae quae super caelos sunt, eiusdem naturae poterunt credi cum elementaribus aquis.
According to the first opinion, Basil gives two replies (Hom. iii in Hexaem.). He answers first, that a body seen as concave beneath need not necessarily be rounded, or convex, above. Secondly, that the waters above the firmament are not fluid, but exist outside it in a solid state, as a mass of ice, and that this is the crystalline heaven of some writers.
Secundum vero primam, respondet Basilius dupliciter. Uno modo, quia non est necessarium ut omne quod in concavo apparet rotundum, sit etiam supra rotundum secundum convexum. Secundo, quia aquae quae sunt supra caelos, non sunt fluidae; sed quasi glaciali soliditate circa caelum firmatae. Unde et a quibusdam dicuntur caelum crystallinum.
According to the first opinion these waters are set there to temper the heat of the celestial bodies, as Basil supposes (Hom. iii in Hexaem.).
Secundum vero primam opinionem, aquae sunt ibi, ut Basilius dicit, ad contemperandum calorem caelestium corporum.
2. But if by the firmament we understand the starry heaven, not, however, as being of the nature of the four elements then the waters above the firmament will not be of the same nature as the elemental waters, but just as, according to Strabus, one heaven is called empyrean, that is, fiery, solely on account of its splendor: so this other heaven will be called aqueous solely on account of its transparence; and this heaven is above the starry heaven. Again, if the firmament is held to be of other nature than the elements, it may still be said to divide the waters, if we understand by water not the element but formless matter. Augustine, in fact, says (Super Gen. cont. Manich. i, 5,7) that whatever divides bodies from bodies can be said to divide waters from waters.
Si autem per firmamentum intelligatur caelum sidereum quod non sit de natura quatuor elementorum, tunc et aquae illae quae sunt supra firmamentum, non erunt de natura elementarium aquarum, sed sicut, secundum Strabum, dicitur caelum Empyreum, idest igneum, propter solum splendorem; ita dicetur aliud caelum aqueum propter solam diaphaneitatem, quod est supra caelum sidereum. Posito etiam quod firmamentum sit alterius naturae praeter quatuor elementa, adhuc potest dici quod aquas dividit, si per aquam non elementum aquae, sed materiam informem corporum intelligamus, ut Augustinus dicit, super Gen. contra Manich., quia secundum hoc, quidquid est inter corpora, dividit aquas ab aquis.
According to the second opinion, the waters are above the heaven that is wholly transparent and starless. This, according to some, is the primary mobile, the cause of the daily revolution of the entire heaven, whereby the continuance of generation is secured. In the same way the starry heaven, by the zodiacal movement, is the cause whereby different bodies are generated or corrupted, through the rising and setting of the stars, and their various influences.
Secundum vero secundam opinionem, aquae sunt supra firmamentum, idest caelum totum diaphanum absque stellis. Quod quidam ponunt primum mobile, quod revolvit totum caelum motu diurno, ut operetur per motum diurnum continuitatem generationis, sicut caelum in quo sunt sidera, per motum qui est secundum zodiacum, operatur diversitatem generationis et corruptionis, per accessum et recessum, et per diversas virtutes stellarum.
An order of the elements must be supposed different from that given by Aristotle, that is to say, that the waters surrounding the earth are of a dense consistency, and those around the firmament of a rarer consistency, in proportion to the respective density of the earth and of the heaven.
Oportet ponere alium ordinem in elementis quam Aristoteles ponat; ut quaedam aquae spissae sint circa terram, quaedam vero tenues circa caelum; ut sic se habeant illae ad caelum, sicut istae ad terram.
Or by the water, as stated, we may understand the matter of bodies to be signified.
Vel quod per aquam intelligatur materia corporum, ut dictum est.
3. If, however, we understand by the firmament that part of the air in which the clouds are collected, then the waters above the firmament must rather be the vapors resolved from the waters which are raised above a part of the atmosphere, and from which the rain falls.
Si autem per firmamentum intelligatur pars aeris in qua nubes condensantur, sic aquae quae supra firmamentum sunt, sunt aquae quae, vaporabiliter resolutae, supra aliquam partem aeris elevantur ex quibus pluviae generantur.