The canopy over the Earth. But that would have been such an astronomical amount of water up there in the sky. assuming that the "canopy" was held up like the satellites, at that heights, by orbital velocity, it would need only to be 20 meters thick. Compared to the rings of saturn, such a structure would reach way past the moon. Moon= la Lune, that is why this flood from the sky idea is lunatic. It is the coming down part that hurts, the fall at the end =heat. lots of it. Life did not drown in the flood, it would have been steamed, including the ark.