The Future of Water Management in a Changing World

'Day Zero' never arrived in Cape Town, South Africa. Day Zero was the name given by Cape Town officials to the day in 2018 they would have to shut down water flows to most of the city taps because of inadequate water supplies—supplies that had run desperately short in the wake of an extreme three-year drought. Day Zero never came for two reasons: First, those officials cajoled Cape Town residents into cutting water consumption in half. Second, the rains finally resumed a few months later. Now Mexico City and Bogotá are both facing…