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. 2022 Feb 27;19(5):2770. doi: 10.3390/ijerph19052770

Table 1.

Heat Index and impact on human comfort [40,41].

Temperature (°C) Impact on Human Comfort
27–32 °C Caution fatigue is possible with prolonged exposure and activity. Continuing activity could result 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.