@ai6yr @chris even if most of it is intact, a control cable melting could be enough to disable the generators. Or a coax cable could melt and kill the transmitter. Or the AC in the comms bunker could fail. Or etc etc etc.
For that matter, backup generators fail to work about 10% or more of the time. I've found that to be true across the nuclear power industry, hospitals, data centers, and the defense sector over the last 15 years.