Yeah, if we're talking preparation for the home there's little reason not to keep at least a bit of water on hand. It's so cheap as to be nearly free but priceless when you need need it. It may be impractical for most folks to keep hundreds of gallons but even 20-30 gallons will fit in even a small apartment and could make a big difference during a disaster.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman