What would happen to the world if the level of the oceans went up a few meters?
This is the idea behind the  Flood Maps website, which uses Google Maps to simulate an increase in the level of the oceans.
Through the options available, you can display the areas that would be underwater if the level of the oceans increased by up to 14 meters. For instance, my home town, Joinville, State of Santa Catarina, would be almost completely covered by water.