This wide-ranging work roams from the driest desert on earth to a frigid island in the Arctic, from the Biblical flood to the defeat of the Spanish Armada. Redniss visits the headquarters of the National Weather Service, recounts top-secret rainmaking operations during the Vietnam War, and examines the economic impact of disasters like Hurricane Katrina. Drawing on extensive research and countless interviews, she examines our own day and age, from our most personal decisionsDo I need an umbrella today?to the awesome challenges we face with global climate change.