I guess power cut is the same as power outage? If so, I think it was almost 7 days straight during and after Hurricane Sandy that hit New Jersey back in autumn 2012. Many people had severe (or total) damage to their homes, trees fell on power lines cutting out power, employees got to stay home since business had no power, grocery store supplies were very limited, many lost the contents of their refrigerators/freezers, there was no heating (or obviously light) for many, some people had trouble cooking food, many roads were impassible. It was rough!

What was one of the worst natural disasters you lived through?