The closer the wet-bulb temperature gets to human body temperature (37°C, the less you can sweat, so the closer you are to being killed by heat.

This account posts forecasts for the most dangerous upcoming heatwaves worldwide, that is, those with the highest wet-bulb temperatures

This bot was built by and is run by @eob. Feedback welcome.

See also a companion bot @heatwave_usa for heat waves just in the United States

Weather data from https://openweathermap.org