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Heat Index Guidelines

WetBulb Globe Temperature (WBGT): temperature, humidity, wind speed, sun angle,
and cloud cover (solar radiation).
Category 3 Outdoor Activity Guidelines
WBGT <82.0° F 

GREEN

Normal Activities - Provide at least three separate rest breaks each hour with a minimum duration of 3 minutes each during the workout.

 

WGBT 82.2° F - 86.9° F 

YELLOW

Use discretion for intense or prolonged exercise; Provide at least three separate rest breaks each hour with a minimum duration of 4 minutes each.

 

WGBT 87.1° F - 90.0° F 

ORANGE

Maximum outdoor practice time is 2 hours. Provide at least four separate rest breaks each hour with a minimum duration of 4 minutes each. For Football/Field Hockey: players are restricted to helmets, shoulder pads, and shorts during practice. If the WBGT rises to this level during practice, players may continue to work out wearing full pads without changing to shorts.

WGBT 90.1° F - 91.9° F

RED

Contests are permitted with additional hydration breaks. Maximum outdoor practice time is 1 hour. No protective equipment may be worn during practice, and there may be no conditioning activities. There must be 20 minutes of rest breaks distributed throughout the hour of practice.

WGBT ≥92.1° F

BLACK

No outdoor workouts/contests. Delay practice/competitions until a cooler WBGT is reached.


Download Athletic Heat Illness Protocols