Heat and humidity are climbing in many of the most populous U.S. cities, and the perilous trend will continue through 2050 (see graphic below). Heat is the top weather killer. Interactive graphics about increasing “danger days” can be found in a sweeping new report by Climate Central.
Mark Fischetti is a senior editor at Scientific American. He covers all aspects of sustainability. Follow him on Twitter @markfischetti Credit: Nick Higgins