I watched this and was thinking that floods really could effect a lot of people. Power goes out, fresh water can't be pumped. It's happened in my town and dispite no ones house flooding, we was without water for weeks. One dad on the documentary said he had to raid a wrecked shop for bottled water. I think I have 3 lots of 6*2l bottles now.
So for drinking we are OK. I would forget washing etc. But flushing the loo? I need to check the water butt is still working. Unless we DID flood of course