The chapter
The sign that the end had come was small and domestic: the oven gushed. Water rising from the tanur, the household hearth, was the appointed signal. Then the command that no engineering has ever matched: "So We opened the gates of the sky with pouring water, and caused the earth to burst with springs, and the waters met for a matter already decreed."
Water from above and water from below, meeting. Nuh loaded the ark as commanded: two of every kind, his family, and those who believed, and only a few believed. The Qur'an gives the ship's motion one line of terrifying scale: "It sailed with them through waves like mountains."
In the middle of that scene the Qur'an places the most painful conversation in the whole flood story. Nuh saw his son apart and called across the water: "O my son, ride with us and do not be with the disbelievers." The young man answered like a modern man: "I will take refuge on a mountain that will protect me from the water", self-rescue, high ground, no need for the ark. Nuh's reply closes the argument of every age: "There is no protector today from the command of Allah except for him upon whom He has mercy." And the waves came between them, and he was among the drowned.
Nuh cried out for his son: "My Lord, my son is of my family, and Your promise is true." The answer redefined family forever: "O Nuh, he is not of your family; his was a deed not righteous." Kinship in the scale of Allah is faith and works, not blood.
Then two commands in a single verse of matchless majesty: "O earth, swallow your water; O sky, withhold." The water receded, the matter was concluded, and the ark settled, carrying inside its planks the entire future of mankind toward Judi. "And We left it as a sign, so is there any who will remember?"