600 Million People Affected in India Blackout

India's electricity grids suffered another massive failure Tuesday, the second in two days, frustrating commuters, stranding coal miners and leaving more than 600 million people without lights, rail service or air conditioning in 90-degree heat.

R.K. Nayak, chairman of the Power Grid Corporation of India, told reporters at a new conference in the capital that the problem was difficult to pinpoint given the network's complexity, but that he hoped to see the system up and running by midnight.