Fluid Replacement Policy for Warm Weather

Fluid Replacement Policy for Warm Weather

(Average acclimated soldier wearing BDU, Hot Weather)

Easy Work1

Moderate Work1

Hard Work1

HEAT

WBGT

Work/

Water

Work/

Water

Work/

Water

CATEGORY

INDEX,

Rest**

Intake,

Rest**

Intake,

Rest**

Intake,

F*

Qt/hr**

1

78 - 81.9

NL***

1/2

NL***

3/4

40/20

3/4

min

2

82 - 84.9

NL***

1/2

50/10

3/4

30/30

1

(Green)

min

3

85 - 87.9

NL***

3/4

40/20

3/4

30/30

1

(Yellow)

min

4

88 - 89.9

NL***

3/4

30/30

3/4

20/40

1

(Red)

min

5****

90 or

50/10

1

20/40

1

10/50

1

(Black)

more

min

1

See Table 9-2 for examples of work categories.

*

Wearing body armor adds 5 units to the WBGT Index. Wearing all MOPP

overgarments adds 10 units to the WBGT Index.

**

Work/rest times and fluid replacement volumes (in quarts per hour) will sustain

performance and hydration for at least 4 hours of work in the specified heat

category. Rest means minimal physical activity (sitting or standing) and should be

accomplished in shade if possible. Individual water needs will vary quarts per

hour. Hourly fluid intake should not exceed 1 quarts. Daily fluid intake should

not exceed 12 quarts.

***

NL = no limit to work time per hour.

**** Suspend physical training and strenuous activity. If an operational (nontraining)

mission requires strenuous activity, enforce water intake to minimize expected

heat injuries.

Table 9-1. Table for determining rest and water intake requirements.

IS0877

9-6