Greetings!
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Fourth:
Water has traditionally been the biggest of many weaknesses associated with possible complications involving the loss of electricity in the Big Apple. You might want to keep up to 2 weeks of water on hand at all times.
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Huh? NYC water is NOT pumped unless you live in a high rise - "natural" water pressue in NYC will bring water to about the 4-6 floor - it's gravity all the way from upstate, no pumps, so electric failures don't really cause problems in "NYC" but does in buildings. If you get down to the street, things like hose bibs and hydrants work (and yes, I carry a real hydrant wrench in the truck)