The temperature the human body cannot survive

Scientists have identified the maximum mix of heat and humidity a human body can survive. The theorised human survival limit of 35C wet bulb temperature represents 35C of dry heat as well as 100 percent humidity -- or 46C at 50 percent humidity. They found that participants reached their "critical environmental limit" -- when their body could not stop their core temperature from continuing to rise -- at 30.6C wet bulb temperature, well below the previously theorised 35C. His research has shown that El Nino weather phenomena have pushed up wet bulb temperatures in the past. Wet bulb temperatures are also closely linked to ocean surface temperatures, Raymond said.