“We started off an earlier article about rainwater by suggesting that a few 55 gallon drums of water taken from your downspouts would be a great source of emergency water in a Level 1 type, at-home, emergency.
If you’re planning for a short duration Level 1 situation, then you don’t need a lot of water, and even a single 55 gallon drum of rainwater would probably be enough – albeit on an uncomfortable hardship type basis – for a week or so, and larger quantities will allow you to enjoy successively more ‘creature comforts’ (such as flushing toilets).
But what about Level 2/3 situations – possibly a year or longer, when you need to be self-contained in everything you eat or drink?
A 55 gallon drum of water doesn’t go very far in that sort of case, does it…”