Three experts on Extreme Heat: Elizabeth Hanna, Robert Kopp and Jonathan Patz. Deadly heat in India, unheard-of heat in France. The Arctic is thawing out. The U.S. East Coast roasted over 100 degree F. Around the world, people have died and many more will be killed by heat in the future. But how does heat kill? and who? A compilation from the best of Radio Ecoshock (replay).