Heavy traffic moves along a busy road as it rains during a power-cut at the toll-gates at Gurgaon on the outskirts of New Delhi July 31, 2012. Grid failure hit India for a second day on Tuesday, cutting power to hundreds of millions of people in the populous northern and eastern states including the capital Delhi and major cities such as Kolkata. REUTERS/Stringer (INDIA - Tags: ENERGY SOCIETY TRANSPORT) - RTR35QBV