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.