On Thursday, July 13, 1995, Chicagoans awoke to a blistering day on which the temperature would eventually climb to 106 degrees. It was the start of an unprecedented heat wave that would last a full week - and leave more than seven hundred people dead. Rather than view these deaths as the inevitable consequence of natural disaster, sociologist Eric Klinenberg decided to figure out why so many people - and, specifically, so many elderly, poor, and isolated people - died, and to identify the social and political failures that together made the heat wave so deadly. Published to coincide with the twentieth anniversary of the heat wave, this new edition of Klinenberg's groundbreaking book includes a new foreword by the author that reveals what we've learned in the years since its initial publication in 2002, and how in coming decades the effects of climate change will intensify the social and environmental pressures in urban areas around the world.