Three days of rainfall have caused a level of flooding seen only "once in a thousand years" in China, with scientists blaming the intensity of the downpour on global warming.

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Riverbanks burst, subway systems were submerged and there are fears dams will be overwhelmed.

Dozens have died, and more than 100,000 evacuated, with the worst flooding devastating the city of Zhengzhou, on the Yellow River, the capital of east-central China's Henan province.

Producer: Dani Isdale

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