Sea-Level rises: North and South America, Europe

http://www.geo.arizona.edu/dgesl/research/other/climate_change_and_sea_level/sea_level_rise/south_america/slr_south_america_a.htm

According to the site above, Guyana and other places in South America are susceptible to a sea level rise of up to 6 meters.

This would be devastating - if we consider that it might no longer be possible to halt global warming as a lot of studies are suggesting, then does this indicate a need to look at whether it is necessary to start to plan to relocate large swaths of the Guyanese population away from the coastline and further inland to higher ground?

Does it also indicate a need to hugely invest in more barriers against the ocean? How serious is this issue?

North America:
http://www.geo.arizona.edu/dgesl/research/other/climate_change_and_sea_level/sea_level_rise/north_america/slr_north_america_a.htm


Europe:
http://www.geo.arizona.edu/dgesl/research/other/climate_change_and_sea_level/sea_level_rise/europe/slr_europe_a.htm

So, how long do we have?
http://www.cop.noaa.gov/stressors/climatechange/current/slr/climatechange.html