Heat exhaustion vs heatstroke: How to tell the difference and what you should know

Heat exhaustion and heatstroke are severe heat-related illnesses with distinct symptoms and risks. Heat exhaustion involves heavy sweating, dizziness, and weakness, while heatstroke—a life-threatening condition—can cause high body temperature, confusion, and unconsciousness. Medical attention is critical for both, with immediate 911 calls required for heatstroke.