Johannesburg, South Africa.
Droughts are disasters on a slow fuse.
Both happen with or without global warming. But the drought and famine in Ethiopia, the desiccation of Rajasthan, the arid cornland of the US west, and the towns in Mozambique and Venezuela swept by storms and floods, are beginning to look like pieces in the same ominous jigsaw. What you can say is that global warming makes any of these or all of them more likely. This is because more heat should mean more evaporation and more wind energy, and therefore more violence. So far, events have matched predictions with an eerie precision.