Cape Town, South Africa, July 9 “Day Zero.” That’s when water taps throughout the city are expected to go dry before Israel declared statehood in 1948, its leaders focused on water security as closely as they did military preparedness. Israel is in the fifth year of drought, today citizens can reliably count on abundant water. Cape Town another story. reservoirs began receding more than two years ago. This problem turned into a crisis because of subsidy-distorted water pricing, inefficient irrigation, and a lack of desalination facilities and a long-term plan. In 2016 officials from Israel’s Foreign Ministry recognized the problem...