The third largest city in the world is starting to have water troubles.  From the Guardian:

In Brazil, a land of immense natural riches and home to around 12% of the world’s fresh water, the very idea of a water shortage is hard for people to conceive of. Yet despite the state government’s prevarication over possible imminent rationing – consisting of two days of water followed by four days without – in reality, millions are now getting just a few hours of water per day, with many struggling with none at all for days on end.

The São Paulo water crisis, or “hydric collapse” as many are calling it, has left this city of 20 million teetering on the brink. Though domestic use accounts for only a fraction of the water consumed in the state of São Paulo – where extensive agriculture and industry places intense pressure on available resources – for paulistanos, as the city’s residents are called, learning to use water wisely is suddenly the most pressing need of all.