9.7 North America

Much of the North American continent will disappear beneath the angry and churning seas, never to rise again in your time.
The waters will move in from the north, and the seas above Canada and Alaska will flood the upper part of the North American continent.
Although all of this area will shift northward, climates will be different. Very cold climates, such as the northern portions of Canada and Alaska will become temperate, but it will take some time. It’s almost as if this whole side of the world is going to be temperate.

I don’t think there will be any cold climates at all. When the South Pole moves northward, it will move into a tropical climate, so both poles will melt. And the new poles working from the inside out, would take many, many years in those positions to spread enough cold to freeze into poles like we have now.
He saw the Bering Strait appearing as a land bridge once again. The area between the St. Lawrence Seaway, the Great Lakes and Hudson Bay would be washed out very quickly by the melting of the ice caps. It would be a couple of centuries later before additional islands would be created by the new polar caps reclaiming their ice and thus lowering the sea level.