WARNING FLAGS at LACKLAND AFB

As the heat and humidity continue to increase at Lackland, various flags can be seen flying across base. These flags are flown in accordance with Air Education and Training Command Instruction 48-101 and indicate training requirements for hot environments. The weather value may change depending on one’s clothing. Wearing body armor or other impermeable clothing, such as firefighting gear and ground crew ensemble, may change the temperature as much as 15 degrees Fahrenheit. Hourly fluid intake should not exceed 1 1/2 quarts to help prevent hyponatremia, or acute water intoxication.

WHITE

WHITE FLAG 78 - 81.9 F

Easy work - No work limits
1/2 quart of water per hour
Moderate work - No work limits
3/4 quart of water per hour
Hard work - 40 minutes of work to 20 minutes of rest
3/4 quart of water per hour

 
GREEN

GREEN FLAG 82 - 84.9 F

Easy work - No work limits
1/2 quart of water per hour
Moderate work - 50 minutes of work to 10 minutes of rest
3/4 quart of water per hour
Hard work - 30 minutes of work to 30 minutes of rest
1 quart of water per hour

 
YELLOW

YELLOW FLAG 85 - 87.9 F

Easy work  - No work limits
3/4 quart of water per hour
Moderate work - 40 minutes of work to 20 minutes of rest
3/4 quart of water per hour
Hard work - 30 minutes of work to 30 minutes of rest
1 quart of water per hour

 
RED

RED FLAG 88 - 89.9 F

Easy work - No work limits
3/4 quart of water per hour
Moderate work - 30 minutes of work to 30 minutes of rest
3/4 quart of water per hour
Hard work - 20 minutes of work to 40 minutes of rest
1 quart of water per hour

 
BLACK

BLACK FLAG   > 90 F

Easy work - 50 minutes of work to 10 minutes of rest
1 quart of water per hour
Moderate work - 20 minutes of work to 40 minutes of rest
1 quart of water per hour
Hard work - 10 minutes of work to 50 minutes of rest
1 quart of water per hour