How Extreme Heat Affects The Body
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26 April 2026
Extreme heat forces the body to work harder to maintain a stable internal temperature, often leading to dehydration, increased cardiovascular strain, and heat-related illnesses
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Cardiovascular strain: Your heart pumps harder to send blood to the skin for cooling. This can drop blood pressure, cause fainting, and raise heart attack risk
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Cooling system failure: When sweat can't evaporate, heat builds up. That leads to dizziness, muscle cramps, exhaustion, and heatstroke. Severe heatstroke can cause organ failure or death
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Dehydration and fatigue: Heavy sweating drains fluids and salts, leaving you exhausted, weak, and dizzy
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Heat cramps: Extreme heat triggers painful muscle spasms, usually in the legs or abdomen
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Heat Exhaustion: Symptoms include heavy sweating, rapid pulse, dizziness, nausea, and headache
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Heatstroke: This is a medical emergency occurring when the body temperature exceeds 40°C and sweating may stop, resulting in hot/dry skin, confusion, seizures, or loss of consciousness
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Worsens chronic diseases: Extreme heat can aggravate existing conditions like cardiovascular disease, diabetes, and asthma
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