Effects of The Heat Index (shade Values)
| Celsius | Fahrenheit | Notes |
|---|---|---|
| 27–32 °C | 80–90 °F | Caution — fatigue is possible with prolonged exposure and activity. Continuing activity could result in heat cramps |
| 32–41 °C | 90–105 °F | Extreme caution — heat cramps and heat exhaustion are possible. Continuing activity could result in heat stroke |
| 41–54 °C | 105–130 °F | Danger — heat cramps and heat exhaustion are likely; heat stroke is probable with continued activity |
| over 54 °C | over 130 °F | Extreme danger — heat stroke is imminent |
Exposure to full sunshine can increase heat index values by up to 8 °C (14 °F).
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