South India’s biggest city, Chennai, is currently in the grip of drought. With the four main reservoirs which supply the city dry, residents have to queue for hours to collect pots of water from government tankers. Critics argue that the shortage isn’t just the result of a single failed monsoon season, but also the responsibility of the government who failed to plan for this scenario. Experts say 21 Indian cities could run out of groundwater next year, and that demand for drinkable water could outstrip supply by double in just a decade. So this week we ask, what can be done to solve this crisis?

Image: Indian residents get water from a community well in Chennai Credit: Arun Sankar//AFP/Getty Images