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1.Sao Paulo, Brazil

The financial capital of Brazil suffered an acute water crisis in 2015 when its principal reservoir went below 4% capacity. The situation has improved a bit but the city of 21.7 million inhabitants is still staring at an uncertain future.

11 cities likely to run out of drinking water

As growing urban populations around the globe struggle to gain access to natural resources, we take a look at some major cities that are fast running out of fresh water.