that's what i was going to say---shouldn't your business continuity plan describe how you will "continue business" in a situation like this??? it should, and it shouldn't be that you close your doors--that is definitely NOT continuing business. security cameras and alarms should have constant power that uses a back up if the power goes out. also, if you use voip for phones, you should have a back up phone that will work when power is out. we had to address this in our plan since we are in CA with possible rolling blackouts, but this is an issue that should be addressed in your BCP in such a way as to allow your customers to continue banking. each of our branches have a disaster kit that hs paper copies of all the forms they will need, pens and pencils, a radio, calculators, batteries, flashlights, disposable cameras and some even have video cameras, and emergency phone list... you really need to be prepared to continue operations. your customers don't quit banking just because your power is out or your computers crashed.
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Dabbling in banking, law, accounting...the life of a trustee.