That's fine. If a tornado ripped through their datacenter, I could see that being Force Majeure. Failure to have a backup generator (or other power protection mechanism) is not force majeure and you would be hard pressed to find a judge that would say otherwise. Failure to have power for any reason is considered a predictable event that any datacenter operator should be able to deal with for 24 hours.
No, I don't know for fact that they don't have adequate power backup. I do know for fact that they didn't loose their roof. I also know, as I live in the general area, that other than a few trees down here and there, power was the only problem.
I certainly didn't see anything about trees falling on datacenters in the storm reports I've read through. I have, however, read about many many people being out of power because of the winds.
The inability for AT&T's datacenter in Michigan to have power backups that can last more than a day should hardly be considered a natural disaster.
I'd love to see something happen in terms of getting money back, but somehow I doubt most subscribers care enough to push for it.
Then amazon needs to do a much better job of determining who their clients really are, and there are quite a few fairly reliable ways of doing so.
Nothing is perfect, but it can be made very hard.
If you can't learn to do it well, learn to enjoy doing it badly.