Which of the following is a symptom of heat-related illness?

• A. Tiredness
• B. Sneezing
• C. Weight gain
• D. Blurred vision

Answer: (A)

Tiredness appears because the body is overheating and often dehydrated, so you feel weak and fatigued as a warning sign that you’re not regulating temperature well. This is a common early symptom of heat-related illness and signals you should cool down and rehydrate before conditions worsen. Sneezing isn’t caused by heat stress, weight gain isn’t typical from heat illness ( dehydration usually leads to weight loss from fluid loss), and blurred vision isn’t a standard early warning sign—while severe heat illness can affect alertness, blurred vision isn’t the usual indicator you’d rely on in the field. Recognizing fatigue early helps prevent progression to more serious conditions like heat exhaustion or heat stroke.