EDWARDSAFBI48-107 — Prevention Of Heat Stress Disorders

EDWARDSAFBI48-107 governs Edwards Air Force Base responsibilities and procedures for preventing the adverse health effects of heat stress.

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  • Publication number: EDWARDSAFBI48-107
  • Title: PREVENTION OF HEAT STRESS DISORDERS
  • Date: 2025-12-15

View EDWARDSAFBI48-107 on armypubs.army.mil


EDWARDSAFBI48-107 covers heat stress monitoring, acclimatization, occupational exposure, work/rest cycles, and the Fighter Index of Thermal Stress. It requires heat stress advisories, preventive measures, and procedures for personnel working in hot environments.

Applies to: This instruction applies to all personnel who are assigned to EAFB with the exception of contractor personnel.

Topics covered

  • Heat stress monitoring
  • Heat acclimatization
  • Occupational heat exposure
  • WBGT flag conditions
  • Fighter Index of Thermal Stress
  • Heat illness prevention

Questions and answers

When does heat stress monitoring begin and end?

Depending on seasonal variation, monitoring will begin after Memorial Day or when the peak ambient temperature reaches 95℉ for three consecutive days. Monitoring will end after Labor Day or when the peak ambient temperature falls below 95℉ for three consecutive days. (paragraph 5)

How often is the WBGT index monitored during normal duty hours?

412 OMRS/SGXB will perform WBGT index monitoring every two hours during normal duty hours from 0800 until 1600L. (paragraph 5)

What happens when the WBGT index reaches 90 degrees?

If WBGT index reached 90℉ at any time, Stage 5 (Black Flag) heat stress advisory level will be sustained until the ambient temperature drops below 95℉. (paragraph 5)

When are personnel considered occupationally exposed to heat?

Personnel who routinely perform their jobs in hot environments (such as aircraft maintenance, grounds maintenance, and repair work in steam pits and tunnels) are considered occupationally exposed. (paragraph 4)

When are exposures above 90 degrees WBGT allowed?

Exposures above 90˚F (Black Flag) WBGT should be allowed only when performing mission essential duties, and then only with caution. (paragraph 4)

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