What are the signs of heat exhaustion?

Heat exhaustion is a serious condition that can occur when the body loses an excessive amount of water and salt, typically due to prolonged exposure to high temperatures and vigorous physical activity in those conditions. Recognizing the signs of heat exhaustion is vital for prompt treatment and prevention of more severe heat-related illnesses.

The presence of dry mucous membranes and dilated pupils indicates dehydration and an inability to cool down properly. When the body cannot retain or replenish adequate fluids, the skin and mucous membranes can become dry, signaling that the body's hydration levels are low. Additionally, dilated pupils can occur as the body reacts to heat stress, affecting the autonomic nervous system. These signs are characteristic of dehydation linked to heat exhaustion.

Other indicators of heat exhaustion typically include heavy sweating, weakness, dizziness, and fainting, plus symptoms like confusion and irritability can occur as the condition worsens. There are nuances in symptoms, so understanding the specific effects of dehydration—such as the state of mucous membranes and pupil response—is crucial in identifying and treating heat exhaustion effectively.