FIFA: exertional heat illness risk evaluation, based on ambient temperature or WBGT
| Ambient dry temperature | Ambient WBGT | Risk of thermal injury |
|---|---|---|
| 25–31.9°C (77–89.4°F) | 24.0–29.3°C (75–85°F) | Moderate |
| 32–38°C (89.6–100°F) | 29.4–32.1°C (85–89.9°F) | High |
| >38°C (>100°F) | 32.2°C and above (>90°F) | Extreme |
FIFA, Fédération Internationale de Football Association; WBGT, Wet Bulb Globe Temperature.