"The Great Hurricane of 1987" was probably the biggest outage that we have seen, short of industrial action and there was folk without power back then for nearly 3 weeks.
I could kick the BBC for their coverage of the recovery in New York/Jersey. The way electricty cos in the S States go about their recovery work is (i) power to the command centres and hospitals, (ii) then blocks of where they can bring power on quickly to a million folk (iii) then hundred thousand, and then (iv) a thousand, working down to single house issues.........in short, no pun intended, what bang for their buck can they get. With Hurricane Ike in Houston, it took up to three weeks for everybody's power to be returned, like Sandy, that storm was huge and if it had hit Pembroke, then it would have cut a swathe of damage from Northumberland to Cornwall, across 12 million people.......It is therefore ridiculous to expect all of Jersey and New York to be back on the tricity within a week, even though they would all love it. The Beeb ought to be more responsible in its reporting.