Washington Post, Energy and Environment, August 16, 2016 Article on Smith et al. Lancet article.
From the article:
... scientists are going further by using the Games to teach a grim climate lesson. At a high-end scenario for greenhouse gas emissions, a team of researchers write in the influential medical journal The Lancet, fewer and fewer major cities will be able to host a Summer Olympics as the end of the century nears. The reason? Too much risk of seeing weather conditions get so hot and humid that they would pose a major heat illness danger to athletes.