...snip...Then again, during Queen's extended power outage last summer, I don't recall reading any news stories about people in taller apartment buildings have their taps run dry on higher floors, so I could be wrong. Hmm, or maybe those buildings all had non-electric backup pumps?
There were a few building that did run out of water - I was doing comms for a Red Cross team that was sent out to distribute water. The thing is, byt the time we got there, the power was on
And yeah, below the 6th floor it's gravity feed. Worst comes to worst, go down to street level and get water.
An earthquake or a local disruption IS possible - which is why I DO store water here in NYC