South Beach Miami, FL is flooding now - It will only get worse.

http://www.newyorker.com/magazine/2015/12/21/the-siege-of-miami

To cope with its recurrent flooding, Miami Beach has already spent something like a hundred million dollars. It is planning on spending several hundred million more. Such efforts are, in Wanless’s view, so much money down the drain. Sooner or later—and probably sooner—the city will have too much water to deal with. Even before that happens, Wanless believes, insurers will stop selling policies on the luxury condos that line Biscayne Bay. Banks will stop writing mortgages.

“If we don’t plan for this,” he told me, once we were in the car again, driving toward the Fontainebleau hotel, “these are the new Okies.” I tried to imagine Ma and Pa Joad heading north, their golf bags and espresso machine strapped to the Range Rover.

As temperatures climb again, so, too, will sea levels. One reason for this is that water, as it heats up, expands. The process of thermal expansion follows well-known physical laws, and its impact is relatively easy to calculate. It is more difficult to predict how the earth’s remaining ice sheets will behave, and this difficulty accounts for the wide range in projections.

Low-end forecasts, like the I.P.C.C.’s, assume that the contribution from the ice sheets will remain relatively stable through the end of the century. High-end projections, like NOAA’s, assume that ice-melt will accelerate as the earth warms (as, under any remotely plausible scenario, the planet will continue to do at least through the end of this century, and probably beyond). Recent observations, meanwhile, tend to support the most worrisome scenarios.