Bengaluru is among the 10 metropolitan cities across the world that are staring at 'day zero', a menacing situation where taps start running dry. If immediate steps are not taken, the silicon valley of India will go the Cape Town way. One of the richest cities of Africa, Capetown has been reeling under one of the worst ever water crisis with many reports estimating that the city’s taps will run dry this year, within the next few months.