Rapid population growth only promises to exacerbate water shortages in Lagos. According to the United Nations, the city's population will jump to 24 million during the next decade, making Lagos the third largest city in the world. "We have to speed up infrastructural development because as we increase, so the population increases. We have an institutional problem in the sense that as our infrastructures improve they also attract more people, so it is a circle that keeps growing," says Olumuyiwa Coker, group managing director of the Lagos Water Corporation. Global leaders have made 2015 the deadline for halving the number of people without access to safe drinking water.