Heat stress can result in which of the following?

• A. Weakness and potential illness
• B. Increased alertness
• C. Improved endurance
• D. Hypothermia

Answer: (A)

Heat stress happens when the body's cooling mechanisms can’t keep up with the heat and exertion, leading to fluid and electrolyte loss and a rise in core temperature. As dehydration and reduced blood flow to the muscles set in, you typically feel weak, fatigued, and may become nauseated or dizzy, which can progress to heat-related illnesses like heat exhaustion or heat stroke if not addressed. That’s why weakness and illness are the expected outcomes of heat stress. The other options don’t fit because heat stress generally reduces performance and alertness rather than increases it, it doesn’t improve endurance, and hypothermia is a result of cold exposure, not heat.