I remember back when hurricane Katrina hit New Orleans, there was a shop running VMS for (I think) some financial institution that left a skeleton crew onsite to keep things running. They had 3 sites (if I recall) across the US, but for whatever reason they needed all 3 up as long as possible, so those guys manned the generator. They were doing live blog updates, which was pretty wild at the time.
Eventually the site went offline, but the other VMS sites picked up without losing any data.
Sadly, I can't find anything about this company in a few minutes of searching, so my vague memories are all I have. But I thought it was so cool that the other sites seamlessly picked up when the New Orleans site went down.