The emergence of heat and humidity too severe for human tolerance (2020)
Here again, one of those cases where as a non-native English speaker, despite 12+ years living in English-speaking countries and working for English-speaking companies, I encounter a term for the first time in my 44-years old life: "wet-bulb".The wet-bulb temperature is defined as the temperature of a parcel of air cooled to saturation (100% relative humidity) by the evaporation of water into it, with the latent heat supplied by the parcel.[0]: https://en.wikipedia.org/wiki/Wet-bulb_temperature