What factors determine when to initiate cooling measures for a firefighter with elevated core temperature?

• A. Core temperature, presence of heat illness symptoms, time since exertion, ambient conditions, and medical evaluation results.
• B. PPE color and material.
• C. Time of day and shift length.
• D. Distance to the rehab facility.

Answer: (A)

Cooling should be started based on the firefighter’s current core temperature, presence of heat illness symptoms, time since exertion, ambient conditions, and medical evaluation results. Core temperature gives the actual heat burden on the body, and when combined with symptoms such as dizziness, confusion, nausea, weakness, or altered mental status, it signals a higher risk and the need for cooling to prevent progression. Time since exertion matters because heat production can continue after work ends; starting cooling sooner reduces the chance of worsening illness and speeds recovery. Ambient conditions like temperature, humidity, and radiant heat influence how quickly the body overheats and how effective cooling will be, so they adjust how urgent the cooling response should be and which method to use. Medical evaluation results help confirm the diagnosis and guide ongoing care, including monitoring for complications and determining the appropriate cooling approach. Factors like PPE color/material, time of day or shift length, or distance to a rehab facility don’t determine when cooling should begin; they may affect logistics or risk exposure but not the immediate physiological need for cooling.