Genesis 6:14-16 "So make yourself an ark of cypress wood; make rooms in it and coat it with pitch inside and out. This is how you are to build it: The ark is to be 450 feet long, 75 feet wide and 45 feet high. Make a roof for it and finish the ark to within 18 inches of the top. Put a door in the side of the ark and make lower, middle and upper decks."
The Ark was 3 stories high! Just the sheer size of this ark is amazing. I feel like only Noah and his sons, wife and sons' wives helped with the building of this ark...it would have taken a long time to complete this.
But Noah obeyed as commanded and did everything just as God wanted it done. And God because he found Noah and his family righteous in that generation told him to "Go into the Ark, you and your whole family".
Seven days from the time Noah and his family entered the Ark, God sent the rains that flooded the entire earth for 40 days and 40 nights.
Noah was 600 years old at the time the floodwaters came upon the earth.
Genesis 7:13-16 "On that very day Noah and his sons, Shem, Ham and Japheth, together with his wife and the wives of his three sons, entered the ark. They had with them every wild animal according to its kind, all livestock according to their kinds, every creature that moves along the ground according to its kind and every bird according to its kind, everything with wings. Pairs of all creatures that have the breath of life in them came to Noah and entered the ark. The animals going in were male and female of every living thing, as God had commanded Noah. Then the Lord shut him in."
