I bought a cheap safe from tescos lined it with some vinal flooring and I'm using that as a faraday cage. But I reckon a microwave oven can be used as one, keeps microwaves in so should also keep them out. I took the fuse out of the plug and used to use mine as one before I gave it away.
Plenty of info out there about how to build one. Just depends what you want to protect and what the situation is. If things are really bad then laptops etc won't be much good, but would always be good to have some music
Yea you're right water is the most precious thing you can have, without it life won't last long.
