Wet Bulb Globe Temperature guidelines are taken
from Air Force Pamphlet 48-151, Thermal Stress,
attachment 5. Refer to the original document for
definitive guidance.
Important:
- Read through the notes and definitions
- +10 deg to reading when in protective clothing
| WBGT Range (deg F) | Heat category / Flag color |
| 78.0 – 81.9 | 1 / White |
| 82.0 – 84.9 | 2 / Green |
| 85.0 – 87.9 | 3 / Yellow |
| 88.0 – 89.9 | 4 / Red |
| 90.0 or higher | 5 / Black |
Please consult a health, safety, or medical professional
for additional guidance. If you experience symptoms of
heat strain or stroke, obtain medical help immediately!
