It's the wet bulb thermometer reading (temperature read by a thermometer covered in water-soaked cloth over which air is passed). At 35°C it is considered letha

It's the wet bulb thermometer reading (temperature read by a thermometer covered in water-soaked cloth over which air is passed). At 35°C it is considered lethal for humans after a couple of hours. > Wet bulb thermometer readings are significantly lower than the more familiar dry bulb readings, which do not take humidity into account. Researchers say that at a wet bulb reading of 35C, the body can no longer cool itself by sweating and such a temperature can be fatal in a few hours, even to the fittest people. https://www.telegraph.co.uk/global-health/climate-and-people/hotter-human-body-can-handle-pakistan-city-broils-worlds-highest/ https://www.telegraph.co.uk/global-health/climate-and-people...