And it is, of course, going to get much worse, as temperatures, humidity and waters rise. The Middle East is warming at twice the rate of the rest of the world. By the end of the century, if the more dire predictions prove true, Mecca may not be habitable, making the summer Haj a pilgrimage of peril, even catastrophe. Large tracts of the Middle East will resemble the desert in Ethiopia’s Afar, a vast expanse with no permanent human settlement pressed against the Red Sea. The gleaming Gulf coastal cities by the end of the century could find themselves inundated as waters rise. It is not quite Apocalypse Now, but Apocalypse Foreseeably Soon.