[orionblastar]

They worked with Chinese hackers in order to pull it off. Most likely working for the Chinese government to hack into US servers and steal data without getting noticed.

I'm not sure how the data tapes got erased, but they planted a Raspberry PI to the heating system to turn up the heat and fry them all? Bypassing safety checks and displaying normal readings to the people monitoring it? Wouldn't those people feel the heat going up and panic?

[adynatos]

plausible imho. data tapes could be in area A where people rarely go. admins could be in area B. temps could be set higher in area A, but not in B, at 4 am on a saturday night.