Just over a year ago Delhi was in the grips of an unbearable heatwave. It’s citizens experienced ten continuous days of relentless heat.  Record-breaking temperatures peaked at over 47˚C with little relief overnight as temperatures sustained at an average of nearly 29˚C. That year power supplies failed to keep up with cooling demand and there were reports of social unrest in the north of India as substations were set on fire and power workers held hostage.