Taiz, Yemen: Every day at dawn, 14-year-old Salim Mohammed leaves home to fetch water, trekking from his town in southwestern Yemen to join the queue at the nearest public dispenser. He and his three siblings walk at least 1.6 kilometers and wait, sometimes for hours, hoping to fill up their jerry cans and be back in time for school. “My hands and my back hurt from the loads I carry every day,” said Mohammed, from the family’s temporary apartment, a former grocery store in the city of Taiz.