Chippewa (and Ottawa and Potawotomie - all three of the Three Fires People) oral history tells of living by the sea when terrible floods destroyed the rice marshes and drove the people inland. They had a sign from Gitchee Manitou that their wanderings would end and they would have their new home when they found the new great marshes of rice, which are, of course, the lakes and bogs around the Great Lakes, where they settled.
Their Algonquian cousins still in the East, the Narragansetts and Pequots, have the same story of the flood, which broke the freshwater lake and made it a bay of the sea (Long Island Sound was once a lake).
These are not really myths. They are called legends, but what they really are is oral history. And they are probably at least as accurate as the Torah of the Old Testament, which was also oral history for 1000 years or so until it was written down.
Where do you get your data about the Torah?