Looks like the folks in south Florida are getting worried.

As glacier melt occurs, and the runoff goes into the ocean, ocean levels rise.

This will start causing problems, not just in Florida, but in every seaside port and coastline.  The key issue of having freshwater sources contaminated by the encroaching seawater is something to be aware of.  Especially as so many people are living in urban/slum areas on the coast.  Not only will they lose their homes with sealevel rise, they will lose their sources of fresh water.

And if water sources get contaminated, then we will start to understand how water tables work, and how if contamination occurs in one area, it doesn't stay localized.  Desalination technologies are going to become more necessary in the coming years.