One possible measure to ease the problems of rising sea levels and inland flooding are homes that float. This is not a new idea: such homes have been a common site in Holland for many years. It has even been suggested that entire cities should be made that float. By the end of this century London and New York could both be regularly, or even permanently, flooded.
For ideas see http://www.bbc.co.uk/news/science-environment-27425225 .