Originally Posted By: wolfepack
there is some [water] in the vending machine I could "acquire".

Murphy's Law abounds. Don't ignore possibility that in your #1 scenario (earthquake), power loss could shut down vending machines. If your workplace has back-up generator(s), will they power essential functions only (to exclusion of vending machines)?
_________________________
"Things that have never happened before happen all the time." — Scott Sagan, The Limits of Safety