Which ancient Mesopotamian text features Atrahasis as a survivor of a great flood?

The Epic of Atrahasis is the ancient Mesopotamian text that features Atrahasis as a great-flood survivor.

The Old Babylonian Atrahasis poem tells how the gods decide to reduce humanity through a devastating flood. The god Enki, also called Ea in later traditions, warns Atrahasis and instructs him to build a boat. Atrahasis saves his family, skilled workers, animals, and provisions before the flood arrives.

The text is one of the most important early flood narratives known from Mesopotamia. It shares motifs with the flood story in Genesis and with the Utnapishtim episode in the Epic of Gilgamesh, including divine warning, a boat, survival, and a sacrifice after the waters recede. The stories are related within the wider literary culture of the ancient Near East, but their theological frameworks and details are not identical.

The Atrahasis poem also includes a creation story and an explanation for why the gods seek to limit human population. That broader setting distinguishes it from the shorter ark-centered account in Genesis.