Giant 'heat storms' are scorching the Earth

By Maurice Tamman, Ben Welsh, Pete Mckenzie, Charlie Szymanski, Delgerzaya Delgerjargal, Robbie Corey-Boulet, Loucoumane Coulibaly, Jeff Horwitz and Joan FausIn less than a lifetime, about six and a half decades, heat waves have evolved from sporadic, isolated episodes to massive, cascading weather