The waters receded. “The waters receded from off the earth continually. After the end of one hundred fifty days the waters decreased.”
(Genesis 8:3 WEB)
There is evidence of the water receding all over the planet or disc or whatever we’re on. The whole surface of the earth is messed up from the flood, God didn’t put everything back the way it was before the flood.
Yeah there’s water above the firmament, that doesn’t mean it’s a canopy or whatever word you prefer.
Does it need to say it in the Bible for it to be the case?
Yes, the canopy theory is made up by a group of creationists who misunderstands that the whole of creation is submerged in a firmament, in the midst of water. They have their ideas of space and infinite distance given to them by the world, so instead of saying that we live in a limited space, which is a firmament, they made up canopy theory instead. Canopy theory is the temporary, relatively small body of water that sat over the earth, (not a firmament holding back water in any way) waiting to be released for Noah's flood and then disappear. It is a unbiblical concept altogether, and compromises the reality of creation to make room for their own traditions.
In order to understand what I am saying, you must realize, the scriptures state that there was absolutely nothing in the beginning, but water. It literally is the second verse of the bible. Water is there even before light. We aren't even told how the water appeared, it's just there.
“And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.”
Genesis 1:2
You can't just input endless universe, or galaxies, or stars, quasars and pulsars, black holes, into this part of the creation. There's nothing but water, and God. It would probably be easier if you understood the water to be endless, instead of an outer space being endless, though we aren't told just how vast this body of water is.
From within that water, inside of the firmament, comes our world--including the sun, moon, and the stars. This is key to understanding the firmament. Just water, and then a firmament placed in the water, to divided the water into two to make room for the earth to abide.
“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 made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.”
Genesis 1:6-7
All of what we know is inside of this firmament, submerged in water. All of the stars, moon, and sun. Canopy theory accounts for none of this.
“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: and let them be for lights in the firmament of the heaven to give light upon the earth: and it was so. And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also. And God set them in the firmament of the heaven to give light upon the earth, and to rule over the day and over the night, and to divide the light from the darkness: and God saw that it was good.”
Genesis 1:14-18
Canopy theory is a way for these creationists to make sense of the world that they are willing to believe and accept. When Christians in the 1800's got a hold of Darwin they started mixing some of his ideas into their belief system. The mark of cain started to mean something else. This is exactly the same with us, with all of our sciences and how smart we feel that we are, in our understanding of the world. All of these same creationists do not believe in a firmament in the midst of water as I plainly read it to you, but have twisted all of the meanings to fit their worldview. Canopy theory is just that.
And I love Ken Ham, but when apologists aren't on the side of truth, they end up making all of these answers up that pushes the truth further and further down, and out of reach for most of us.