Seven people were saved in a boat from a flood.
A terrible draught followed the flood, but the people were saved by digging a deep hole in which water formed.
However, all but one young man and woman died of hunger.
These two saved themselves by eating the mice which came out of the ground.
The human race is descended from this couple. [Holmberg, pp. 367-368]
Holmberg, Uno. Finno-Ugric, Siberian, in MacCulloch, C. J. A., ed., The Mythology of All Races, v. IV, Marshall Jones Co., Boston, 1927.
The Mythology of All Races 4: Finno-Ugric and Siberian - Anna’s Archive
Yenisey-Ostyak (north central Siberia):
Flood waters rose for seven days.
Some people and animals were saved by climbing on floating logs and rafters.
A strong north wind blew for seven days and scattered the people, which is why there are now different peoples speaking different languages. [Holmberg, p. 367]
Kamchadale (northeast Siberia):
A flood covered the whole land in the early days of the world.
A few people saved themselves on rafts made from bound-together tree trunks.
They carried their property and provisions and used stones tied to straps as anchors to prevent being swept out to sea.
They were left stranded on mountains when the waters receded. [Holmberg, p. 368; Gaster, p. 100]
Gaster, Theodor H. Myth, Legend, and Custom in the Old Testament, Harper & Row, New York, 1969. (Most of the flood stories in this work are taken from Frazer, 1919.)
Myth, Legend And Custom In The Old Testament: A Comparative Study With Chapters From Sir James G. Frazer's Folklore In The Old Testament (volume 1) - Anna’s Archive
Buryat (eastern Siberia):
The god Burkhan advised a man to build a great ship, and the man worked on it in the forest for many long days, keeping his intention secret from his wife by telling her he was chopping wood.
The devil, Shitkur, told the wife that her husband was building a boat and that it would be ready soon.
He further told her to refuse to board and, when her husband strikes her in anger, to say,
"Why do you strike me, Shitkur?"
Because the woman followed this advice, the devil was able to accompany her when she boarded the boat.
With the help of Burkhan, the man gathered specimens of all animals except Argalan-Zan, the Prince of animals (some say it was a mammoth), which considered itself too large to drown.
The flood destroyed all animals left on earth, including the Prince of animals, whose bones can still be found.
Once on the boat, the devil changed himself into a mouse and began gnawing holes in the hull, until Burkhan created a cat to catch it. [Holmberg, pp. 361-362]
Sagaiye (eastern Siberia):
God told Noj to build a ship.
The devil tempted his wife to find out what he was building in the forest.
When the devil found out, he destroyed by night what Noj built by day, so the boat was not completed when the flood came.
God was forced to send down an iron vessel in which Noj, his wife and family, and all kinds of animals were saved. [Holmberg, p. 362]