It has risen about 1 1/2 feet, there, I believe they said? The land there is also sinking, but melting (land) glaciers and expanding water volume as it warms up are quantifiable and significant. It is about half from each cause (sinking land is about 6-7 inches, and the rest is rising water).
There are at least two island nations that are starting to plan to move their people to other land.
You know, the insurance companies are no longer writing policies for land near the water in low lying areas. Lloyd's of London is the insurance of last resort, and even they have stopped writing some policies. Australia is taking this into account in their planning and policies. Elevated headlands will become islands; shorelines will move significantly, salt water will infiltrate more groundwater -- this is already happening.
Miami FL cannot get by with building dikes -- the land is porous limestone/corral and the water will come in under them. Once this gets high enough, the city will probably have to be abandoned. India is already building a wall to try and keep the Bangladeshis out; as their land floods.
The Navy is very concerned, too and we need to realize why this is happening, and begin to do something.
Listen to the On Point show for yourself:
http://www.onpointradio.org/media-pl...2-01&segment=1