It had rained for 40 days and 40 nights; the water prevailed on the earth 150 days. And God remembered Noah and every living thing that was with him in the Ark.
Genesis is a record of what YeHoVaH revealed to Moses, the author of Genesis. The second day begins with YeHoVaH separating the water that He made in Day One and creating the expanse called Heaven. This Teaching also looks at the alignment of Genesis and The Gospel of John that says all things were made by Him and without Him was not anything made that was made.