👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Physiological Adaptation🔖 Free to read, print, and share
Also known as: heatstroke · sunstroke · hyperthermia · overheating · heat emergency
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Use this quick-reference guide to spot, treat, and prevent Heat Stroke on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
🩺 Signs
Hot dry skin, no sweat
Altered LOC, confusion, seizure
Tachycardia, hypotension
✅ Do
Rapid cool = priority
Cold packs, mist, fans
Cool IV fluids, O2
🧪 Monitor
Stop cooling at 102°F
Watch rhabdo, ↓UO, organ fail
📌 Avoid
Antipyretics don't work
Shivering from over-cooling
📚 Heat Stroke — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Heat stroke is a life-threatening failure of thermoregulation with core temperature above 104 degrees F (40 degrees C) and central nervous system dysfunction. Unlike heat exhaustion, the skin is typically hot and dry because sweating has failed, and altered mental status is a defining feature. Rapid cooling is the priority to prevent organ damage and death.
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Key points
Understand these first
Core temperature above 104 degrees F (40 degrees C) with neurologic changes (confusion, seizures, coma) defines heat stroke.
Classic heat stroke shows hot, dry skin from sweating failure, distinguishing it from heat exhaustion's diaphoresis.
Heat exhaustion presents with heavy sweating, normal or mildly elevated temperature, and intact mental status, and is less severe.
Rapid active cooling is the priority and should not wait for transport or labs.
Complications include rhabdomyolysis, seizures, multi-organ failure, and DIC.
Antipyretics like acetaminophen are ineffective because the cause is environmental, not a reset hypothalamic set point.
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Nursing priorities
What to do, in order
Begin rapid cooling immediately with evaporative cooling, ice packs to groin/axillae/neck, and cool IV fluids.
Remove clothing and move the patient to a cool environment.
Support airway, give oxygen, and monitor neurologic status and core temperature continuously.
Stop active cooling around 102 degrees F (39 degrees C) to avoid overshoot hypothermia.
Monitor for seizures, dysrhythmias, and signs of rhabdomyolysis.
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Red flags — report now
Escalate immediately
Hot dry skin with altered mental status is heat stroke - cool aggressively and escalate now.
Do not give antipyretics; they do not work for environmental hyperthermia.
Report dark tea-colored urine as possible rhabdomyolysis and renal injury.
Seizures or coma indicate severe CNS injury requiring emergency intervention.
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Labs & values
Numbers to know
Core temperature above 104 degrees F (40 degrees C)
Creatine kinase markedly elevated with rhabdomyolysis
Potassium elevated with muscle breakdown
Sodium abnormal; monitor renal function (creatinine/BUN)
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Patient teaching
What patients must know
Avoid strenuous activity during peak heat and take frequent breaks in the shade.
Hydrate with water and electrolyte drinks before and during heat exposure.
Never leave children or pets in parked cars.
Wear light, loose, breathable clothing in hot weather.
❓ Heat Stroke: NCLEX FAQs
What are the priority nursing interventions for Heat Stroke?
Begin rapid cooling immediately with evaporative cooling, ice packs to groin/axillae/neck, and cool IV fluids. Remove clothing and move the patient to a cool environment. Support airway, give oxygen, and monitor neurologic status and core temperature continuously. Stop active cooling around 102 degrees F (39 degrees C) to avoid overshoot hypothermia.
What are the warning signs of Heat Stroke a nurse must report?
Hot dry skin with altered mental status is heat stroke - cool aggressively and escalate now. Do not give antipyretics; they do not work for environmental hyperthermia. Report dark tea-colored urine as possible rhabdomyolysis and renal injury. Seizures or coma indicate severe CNS injury requiring emergency intervention.
What do I need to know about Heat Stroke for the NCLEX?
Core temperature above 104 degrees F (40 degrees C) with neurologic changes (confusion, seizures, coma) defines heat stroke. Classic heat stroke shows hot, dry skin from sweating failure, distinguishing it from heat exhaustion's diaphoresis. Heat exhaustion presents with heavy sweating, normal or mildly elevated temperature, and intact mental status, and is less severe. Rapid active cooling is the priority and should not wait for transport or labs.
What patient teaching is important for Heat Stroke?
Avoid strenuous activity during peak heat and take frequent breaks in the shade. Hydrate with water and electrolyte drinks before and during heat exposure. Never leave children or pets in parked cars. Wear light, loose, breathable clothing in hot weather.
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Quick Tip
Core temperature above 104 degrees F (40 degrees C) with neurologic changes (confusion, seizures, coma) defines heat stroke.