In the time it takes to consume two SCBA air cylinders, enough body fluid can be lost to result in which effect?

• A. Heat Stroke
• B. Syncope
• C. Impaired Temperature Regulation
• D. Heat Exhaustion

Answer: (C)

Losing body fluids during SCBA use in hot, strenuous work directly disrupts how the body manages heat. When fluids are lost, plasma volume falls, which reduces the body's ability to sweat effectively and to redirect blood to the skin for cooling. With less sweating and compromised heat transfer to the skin, heat builds up inside the body more quickly. This impaired thermoregulation is the immediate effect of fluid loss in this context. While continuing dehydration can lead to heat illnesses like heat exhaustion or heat stroke and can contribute to fainting, the core issue at the moment is the body's reduced ability to regulate temperature.