Hugh Pickens writes writes: "BBC reports that a massive power breakdown has hit India for a second day running, leaving more than half the country without power as the northern and eastern grids have both collapsed. The breakdown has hit a large swathe of the country including Delhi, Punjab, Haryana, Uttar Pradesh, Himachal Pradesh and Rajasthan states in the north, and West Bengal, Bihar, Orissa and Jharkhand in the east. Power cuts are a common occurrence in Indian cities because of a fundamental shortage of power and an aging grid and the chaos caused by such cuts has led to protests and unrest on the streets but the collapse of an entire grid is rare — the last time the northern grid failed was in 2001. India's demand for electricity has soared in recent years as its economy has grown but its power infrastructure has been unable to meet the growing needs. In the weeks leading up to the failure, extreme heat had caused power use to reach record levels in New Delhi and on July 30 a line feeding into the Agra-Bareilly transmission section, the 400-kV Bina-Gwalior line, tripped, triggering the collapse. The second grid collapse occurred on 31 July as the Northern, Eastern and North-Eastern power grids of India tripped/failed causing power blackout in 19 states across India. The crisis was allegedly triggered after four states — Rajasthan, Haryana, Punjab and UP — drew much more than their assigned share of power."