In Brazil, a country that contains the world’s largest river and rainforest, it seems implausible that a water shortage could ever occur. Yet that is exactly what is underway in Sao Paulo. The city of 11 million people is in full-scale crisis mode and might soon tap a polluted reservoir to ensure that the pipes don’t run dry in the coming weeks. The city is facing its worst drought in over 80 years, which is compounded by leaking infrastructure that loses as much as 35% of the water that transits through the system. A rapidly growing population and years of unchecked deforestation are also cited as contributing factors.