Power consumption in the capital surged to a record high on Saturday, overwhelming distribution systems and sparking outtages in parts of the city that angered residents left sweltering in heat as high as 47.8 degrees Celsius (118 Fahrenheit).
Damage to some transmission lines during a recent thunderstorm added to the problem.
The newly-elected central government has pledged to improve supplies of power and water, but with key decisions devolved to local governments like that in Delhi, there are limits to what it can do.
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