Cape Town faces Day Zero: what happens when the city turns off the taps?

In 10 weeks engineers will turn off water for a million homes as this South African city reacts to one-in-384-year drought. The rich are digging boreholes, more are panic-buying bottled water, and the army is on standby

Interactive explainer: how Cape Town is running dry

The head of Cape Town's disaster operations centre is drawing up a plan he hopes he never has to implement as this South African city on the frontline of climate change prepares to be the first in the world to turn off the water taps.

"We've identified four risks: water shortages, sanitation failures, disease outbreaks and anarchy due to competition for scarce resources," says Greg Pillay. "We had to go back to the drawing board. We were prepared for disruption of supply, but not a no-water scenario. In my 40 years in emergency services, this is the biggest crisis."