(Bloomberg) -- Gross domestic product at risk of flooding in India, the world’s second-most populous nation, may surge 10-fold by 2030 as cities expand and climate challenges worsen, according to the World Resources Institute.

A new online global flood-analyzing tool developed by WRI and four Dutch research agencies showed India topped the list among countries with population affected by river flooding on average each year.

WRI ranked 163 countries by number of people impacted by river flooding. Led by India, the 15 worst-hit accounted for almost 80% of the total population affected. Bangladesh was a distant second, then China, followed by Vietnam, Pakistan and Indonesia, the tool showed. (Click chart below to enlarge.)

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