A new report from Climate Central has named the cities that are most at risk from rising sea levels, and compared the effects of temperature rises of 4 degrees and 2 degree Celsius.

The following maps were created as part of the Surging Seas analysis, and use Google Earth to map the effects of rising water levels on cities around the world. They are based on forecasts published in the academic journal Proceedings of the National Academy of Sciences of the USA.

On the left you can see the result of a rise of 4 degrees Celsius, and on the right the result of 2 degrees.

Shanghai, China

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In Shanghai, 76% of the population are below the rise caused by a 4 degree increase in temperatures – some 22.4 million people. Even if we restrict warming to a 2 degree increase, this will still affect 11.6 million people.

London, UK

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In London, 13% of the 2010 population live below the sea-level rise caused by a 4 degree increase in temperature.

Buenos Aires, Argentina

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19% of Buenos Aires’s population live below the rise caused by a 4 degree increase – some 2.4 million people.

Cape Town, South Africa

1511B32-cape town sea level rise predictor map

A 4 degree rise in Cape Town, will see 9% of the population below the median locked-in sea-level rise.

New York, US

1511B32-new york sea level rise predictor map

Nearly 3 million people in New York live below the rise caused by a 4 degree temperature increase.

The authors emphasize that these rises will not happen overnight, and will play out over centuries – however if we do not tackle global warming, they highlight that such rises may become unpreventable within a few decades.

Check out how your city will be affected here.

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Author: Joe Myers is a Digital Content Producer at Formative Content.

Image: A man looks towards his house in a slum. REUTERS/Navesh Chitrakar