So what would happen if you bombed Cape Town (or anywhere, really) with a nuclear warhead? Using this nifty little tool, you can see what happens. As you can see in this image, I’ve selected a measly 400 kiloton bomb, and if it strikes Milnerton, you’d still be safe if you lived in Rondebosch. Barely, anyhow. One of the other bombs? Eh, not so much. You can check out how much of your city survives in a missile strike, and even check out an asteroid impact (which would take out half of Africa).
[Link: Carlos Labs – Ground Zero]