The Economic Times of India is reporting that a power outage covering half the country is likely to be the largest ever in India.
Nineteen of India's 28 states with a total population of 670 million people were without power, India's NDTV said, with the lights out even at major hospitals in Kolkata.
India's demand for electricity has soared along with its economy in recent years, but utilities have been unable to meet the growing needs. India's Central Electricity Authority reported power deficits of more than 8% in recent months.
More top news
Transport Secretary Chris Grayling reportedly wants the publicly-owned firm to share responsibility for running tracks with private firms.
Attorney General Jeremy Wright QC said High Court ruling dismissed the public's referendum vote as 'merely' a political event.
Northern and eastern areas will see a touch of frost at first, but most places will see sunshine.