[Vendome]

I remember 1977 when New York made the national news for blackout
https://en.wikipedia.org/wiki/New_York_City_blackout_of_1977

[Iron Munro]

THE GREAT NORTHEAST BLACKOUT OF 1965

The great northeast blackout of 1965 was a significant disruption in the supply of electricity on Tuesday, November 9, 1965.

It affected parts of Ontario in Canada and Connecticut, Delaware, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont in the United States.

Over 30 million people and 80,000 square miles and were left without electricity for up to 13 hours.

There was no information on what had happened on the TV or Radio and those affected didn't know if it was a blackout, a nuclear attack or some sort of major natural calamity.

[Ruy Dias de Bivar]

I remember the blackout of 1965! No crime, no riots, no murders no stealing.
It was blamed on a UFO wiping out power “INCIDENT AT EXITER” by John G. Fuller.
More reliable electrical engineers traced it to a relay failure.