Heat Stress Countermeasures
Please use caution when working or exercising outdoors. Here is a recap of Heat stress countermeasures:
Stage Flag Activity Work Rest
3 Yellow Non-acclimated 35mins 25mins
Acclimated 45mins 15mins
4 Red Non-acclimated 20mins 40mins
Acclimated 30mins 30mins
5 Black Both 20mins 40mins
The key to supervising safe activities outdoors for stage 3 and above is judgment and discretion. Curtail or terminate physical conditioning, intense activity, and outdoors work details for Stages 3 & 4 as appropriate and terminate all physical conditioning and non-essential outdoor work details and activities in Stage 5 (Black Flag). If personnel must be outdoors during stages 3, 4 and 5, ensure they are adhering to the work-rest cycles and drinking plenty of fluids.
For more information, tables and charts, please refer to Air Force Pamphlet 48-151, Thermal Injury at http://www.e-publishing.af.mil/shared/media/epubs/AFPAM48-151.pdf