Corrected estimation of the risk of exertional heat illness based on the wet bulb globe temperature (WBGT) taking into account that WBGT underestimates heat stress under high humidity
| Estimated risk | WBGT (°C) | Relative humidity (%) |
|---|---|---|
| Moderate | 24 | 50 |
| Moderate | 20 | 75 |
| Moderate | 18 | 100 |
| High | 28 | 50 |
| High | 26 | 75 |
| High | 24 | 100 |
| Excessive | 33 | 50 |
| Excessive | 29 | 75 |
| Excessive | 28 | 100 |
Adapted from the categories proposed by Gonzalez185 to estimate the risk of exertional heat illness during a marathon.