As a deadly heat wave continues to ravage the U.S., new evidence suggests the human body may stop functioning optimally when outside temperatures climb to 104 to 122 degrees Fahrenheit.
Research presented Thursday at the annual Society for Experimental Biology conference in Edinburgh, Scotland, suggests that temperatures in that range raise a person’s resting metabolic rate — the amount of energy needed to function at rest.
40 to 50 C for the rest of the world as written in the actual published science article.