Your body has a built-in cooling system—sweating—but particularly hot weather can overwhelm this process. Chronic health conditions, medications, and age can make it even harder to cool down, raising your risk for heat-related illnesses. “There’s a spectrum of problems that can become progressively more severe and even be life-threatening,” says David Farcy, M.D., president of the American Academy of Emergency Medicine. Excessive sweating in skin folds or under tight clothing can cause heat rash, and loss of fluid and electrolytes can trigger muscle cramps. Dehydration plus a rising body temp can result in heat exhaustion, characterized by fatigue, dizziness, nausea, headache, chills, or racing heartbeat. Ignoring these clues can be dangerous and may lead to heatstroke, which can damage the brain. Bright summer weather can lead to sun poisoning, a…
