Heatstroke risk rises when sweating stops under intense sun, experts warn

Medical experts explain that a sudden loss of sweating in hot or humid conditions is rarely harmless. The body relies on sweat to dissipate heat; when sweat production ceases, core temperature can climb rapidly, leading to hyperthermia and possible organ damage. Common triggers include prolonged sun exposure, dehydration, physical exertion, and certain medical conditions such as anhidrosis or autonomic nervous system dysfunction, as well as some medications. Early warning signs are a warm, dry skin, confusion, nausea, intense weakness, and rapid temperature rise. International guidelines advise treating this as a medical emergency: move the person to a cooler environment, rehydrate, and seek immediate professional care. Recognizing the symptom early can prevent serious complications from heatstroke.