News Climate Extreme heat taxes the body in many ways. Here’s how Hotter nights and more humid heat waves are pushing the limits of the human body Extreme heat waves are pushing the human body to the limit. Without ways to cool down, the high temperatures can prove harmful or even fatal. Here, a person attempts to stay cool during a record-breaking heat wave in Phoenix on July 18. Patrick T. Fallon/AFP/Getty Images Plus Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Luis Melecio-Zambrano August 6, 2023 at 7:00 am July 2023 was the hottest month ever recorded.