Rising seas are forcing the 311.000 inhabitants to consider moving. Most of the tiny islands are less than two meters above sea level During the 21st century, oceans are expected to rise another one meter. This could affect cities on coastlines like Paris, Vancouver, Shanghai. New York City and large parts of Bangladesh a country built on a river delta. Climatologists estimate that low lying cities like Venice and Shanghai will be partially submerged under water. Scientists also estimate that for each millimeter rise in sea level, the shoreline retreats an average of 1.5 meters.