Hanoi, May 15 -- Widespread power cuts struck the Philippines on May 15, leaving millions without electricity in the tropical nation's hottest month of the year. The National Grid Corporation of the Philippines (NGCP) said rolling one-hour power outages hit parts of the capital Manila and the rest of the main island of Luzon from mid-afternoon. These were due to "major grid disruptions" that affected transmission lines, as well as a maintenance shutdown of several major power plants, the NGCP and the Department of Energy said. The disruptions are scheduled to spread to the central islands, leading to seven-hour power cuts, NGCP said. Luzon accounts for almost half of the Philippine population of 116 million, as well as economic output. The ...