Here's an example of a worst case senario... going worse.

One of my sites is housed in a data center that has 5 generators. It only takes 4 to completly power the whole place for a week.

Unfortunatly 2 generators failed durring a recent power outage lasting longer than the batteries could sustain. Completely shutting the place down. So yea, HAN could be down for a while.

Time to get a few backup servers... I put one in Chicago, New York and say UK.