Any datacenter with wet pipes in it will be compromised by leaks. If the fire code requires sprinklers rather than FM-200, see if your fire marshal will allow dry pipe systems. If that isn't possible, seek a better location for your datacenter.

The contract you have with your fuel supplier may be flammable but it won't keep your generators running. Your onsite fuel storage must be adequate for your business requirements.

If your backup power systems are inadequate to handle your cooling systems, your backup power systems will keep you up long enough for an orderly shutdown of your datacenter, if you move fast.

Do not build your backup datacenter in a convenient location. Build it instead in a location that's outside of any likely natural disaster that can encompass your primary datacenter.