It is now ten generations since the creation of the first man. Adam's descendants have corrupted the world with immorality, idolatry and robbery, and Hashem resolves to bring a flood which will destroy all the earth's inhabitants except for the righteous Noach, his family and sufficient animals to re-populate the world. Hashem instructs Noach to build an ark in which to escape the flood. After forty days and nights, the flood covers the entire earth, including the tops of the highest mountains. After 150 days the water begins to recede. On the 17th day of the 7th month, this ark comes to rest on Mount Ararat. Noach sends forth a raven and then a dove to ascertain if the waters have abated. The dove returns. A week later, Noach again sends the dove, which returns the same evening with an olive leaf in its beak. After seven more days, Noach once again sends forth the dove, which this time does not return. Hashem tells Noach and his family to leave the ark. Noach brings offerings to Hashem from the animals which were carried in the ark for this purpose. Hashem vows never again to flood the entire world and gives the rainbow as a sign of this covenant.

Noach and his descendants are now permitted to eat meat, unlike Adam. Hashem commands the Seven Universal Laws: The prohibitions against idolatry, adultery, theft, blasphemy, murder and eating the meat of a living animal, and the obligation to set up a legal system. The world's climate is established as we know it today.

Noach plants a vineyard and becomes intoxicated from its produce. Ham, one of Noach's sons, delights in seeing his father drunk and uncovered. Shem and Yefet, however, manage to cover their father without looking at his nakedness, by walking backwards. For this incident, Canaan is cursed to be a slave. The Torah lists the offspring of Noach's three sons from whom the seventy nations of the world are descended.

The Torah records the incident of the Tower of Bavel, which results in Hashem fragmenting communication into many languages and the dispersal of the nations throughout the world. The Torah portion concludes with the genealogy from Noach to Avram.