This weekend there was a breach in the water line, and all of Boston east of Weston, with the exception of Cambridge, was on a boil water warning. Eebs and I were babysitting that weekend, and didn't get word til we got home in the evening after a production of Pirates of Penzance. By then the panicked masses had cleared out the grocery stores of anything water-like, the family whose house we were staying in didn't have any supply of water and eebs and I have no food storage to speak of. I got our measly 3L jug of water and brought it over. It was late though, and since the kids had to go to bed, everyone ended up brushing their teeth with seltzer water. We drank a lot of seltzer water over the next few days- they had a big supply of that! We also boiled water-- thank heavens it was just at a boil water warning instead of a complete ban, or we would have been in a fix. I heard water even came out brown in some places! Luckily ours wasn't brown and we felt ok boiling it.
This was a startling wake-up call to face a real-world situation where a supply of water would have been good to have on hand. It's not too late to get started! Spring goal: get food storage/emergency preparedness under wraps.