Rising sea levels could cause staggering damage to these cities

Sea levels may rise by about one meter by 2100 if carbon emissions continue unchecked, according to a recent survey of experts, and the effects on coastal cities could be devastating.

A 2008 report from the OECD ranked the most exposed cities, identifying areas that would be exposed if sea levels rose 0.5 meters by 2070 and there was a once-in-a-century storm, accounting for larger storms in some areas (raising water an additional 0.5 meters to 1.5 meters), natural and artificial land shifts, and urban growth.

Calcutta, India could be hit hardest, with 14 million people and $2.0 trillion in assets exposed in 2070 — and the problem could get even worse by 2100.

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