no need to burn them down, just focus on the chillers. if they use evaporative coolers a water balloon partially filled with oil and soap will fuck that entire system.
also better to cripple then destroy as they get a full insurance payout where just drastically degrading facility performance is harder to prove the monetary value.
It's a good to keep mentioning when the US does stuff like this as a warning of how quickly a corrupt country can implode.