"I've been thinking a lot about Cadillac Desert in the past few weeks, as the rain fell and fell and kept falling over California, much of which, despite the pouring heavens, seems likely to remain in the grip of a severe drought. Reisner anticipated this moment. He worried that the West's success with irrigation could be a mirage -- that it took water for granted and didn't appreciate the precariousness of our capacity to control it." -...