That kind of facility tends to have its own backup power, often with a week or so of fuel stockpiled on-site.
Back when Hurricane Katrina hit New Orleans, there was a period where the only building with power was a datacenter. The lights prompted soldiers to break in, and the system admin wound up having to pretend that they’d discovered evidence of somebody nefarious forcing the door, so they’d clear the building and leave.
That kind of facility tends to have its own backup power, often with a week or so of fuel stockpiled on-site.
Back when Hurricane Katrina hit New Orleans, there was a period where the only building with power was a datacenter. The lights prompted soldiers to break in, and the system admin wound up having to pretend that they’d discovered evidence of somebody nefarious forcing the door, so they’d clear the building and leave.