https://en.wikipedia.org/wiki/Heat_index
The Heat index refers to the perceived temperature based on the measured air temperature and relative humidity.
The heat index is a value used by US meteorologists to describe the influence of the measured air temperature and humidity on the human body.
26–32 °C | Caution: fatigue is possible with prolonged exposure and activity. Continuing activity could result in heat cramps. |
32–41 °C | Extreme caution: heat cramps and heat exhaustion are possible. Continuing activity could result in heat stroke. |
41–54 °C | Danger: heat cramps and heat exhaustion are likely; heat stroke is probable with continued activity. |
over 54 °C | Extreme danger: heat stroke is imminent. |
