sunstroke

Imagine spending a long, hot summer day outside without enough water or shade. After hours under strong sunlight, your body may become dangerously overheated, and this condition is called sunstroke. It is much more serious than a sunburn. It happens when your body can no longer cool itself properly, and your temperature rises too high. People may feel weak, dizzy, sick, or confused, and they may need urgent medical help. In everyday use, the word usually refers to severe illness caused by too much heat and sun.

Sunstroke, now more accurately referred to in medical contexts as heatstroke, is a severe form of hyperthermia—a state of dangerously high body temperature. It occurs when the body's natural cooling mechanisms, such as sweating, are overwhelmed by prolonged exposure to direct sunlight or strenuous activity in hot weather. While often confused with a painful sunburn, sunstroke is a far more serious, life-threatening emergency that affects the brain and internal organs.

Historically, the term "sunstroke" specifically implied overheating due to direct sunlight. However, medical professionals now prefer the term "heatstroke" because the condition can also occur from exertion in high temperatures even without direct sun exposure—such as working in a cramped, hot warehouse or exercising in high humidity.

The symptoms of sunstroke are often sudden and alarming: a body temperature of 104°F (40°C) or higher, a throbbing headache, dizziness, nausea, and mental confusion. It requires immediate medical attention; cooling the person down quickly with water, shade, or ice packs is crucial to prevent lasting harm. You may still see this word in everyday speech and in older books; for example, a character working for hours in a field under the blazing midday sun might be described as suffering from "sunstroke." Today, we know that drinking enough water, resting, and staying out of intense heat are key ways to prevent this dangerous condition.