On SurvivalBlog there is an excellent article about the world nearly ending for Cape Town, South Africa. Drought, coupled with the general African inability to govern in anything short of a kleptocratic manner just about did in one of the great cities of the world.
Don’t bet against seeing this story again in the same place.
For us, the lesson to be learned is that it’s great to have x different ways to purify your water, but when there’s no water to purify things get festive in a hurry. Got blue barrels?