Washington Post - Water scarcity has long been an issue in Mexico City, with the brunt of the shortages happening in lower-income neighborhoods on the outskirts of the city center. But recently, residents in some of the city’s wealthier neighborhoods have also been running out of water as hot temperatures, low rainfall and poor infrastructure have converged to create a crisis across the sprawling metropolis. Mexico City gets about a quarter of its water from the Cutzamala system, a series of reservoirs, water treatment plants and lengthy canals and tunnels, which is running dry. Some say the system could be unable to provide water by June 26, known as “Day Zero” in the metropolitan area of 22 million, although scientists say rainfall could avert that disaster. As of May 21, the Cutzamala system is at 28 percent of its capacity, according to the Basin Agency for the Valley of Mexico, a historic low.