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U.S. Air Force Senior Airman John Cates, 52nd Operational Medical Readiness Squadron bioenvironmental engineering technician, left, and Senior Airman Kellie Memoli, 52nd OMRS bioenvironmental engineering technician, record a wet bulb globe temperature reading at Spangdahlem Air Base, Germany, June 25, 2026. Bioenvironmental engineers use the wet bulb globe temperature monitor to assess environmental heat stress by measuring air temperature, humidity, radiant heat and wind conditions. (U.S. Air Force photo by Staff Sgt. Darius Frazier)