Reservoir hogs

摘要

Could Sao Paulo run out of water? The idea of South America's biggest metropolis, home to 20m people, lacking something so basic seems fanciful. Yet shortages this year have forced schools to suspend classes and restaurants to shut in smaller towns across Sao Paulo state, where a fifth of Brazilians live and a third of gdp is produced. For months taps in some neighbourhoods of the state capital itself have run dry, especially in the small hours. Unless the rains are unusually bountiful, a disaster looms in 2015.