Assuming Lake Michigan’s overall water level stays the same, Chicago’s lakefront will be about 4 inches higher in the next century. The slow-motion, seesaw effect is also happening in other cities on the southern end of the lakes: Cleveland could see a 4-inch swell in Lake Erie’s levels and Milwaukee is projected to see a rise of 5½ more inches. Places such as Canada’s Hudson Bay, which was covered by glaciers up to 9,800 feet thick, are rising up to 3 feet per century.