Heatstroke or Dehydration? Know the Signs | Huntsville News

Heatstroke is a life-threatening emergency caused by overheating — often when body temp spikes over 104°F and sweating stops. Doctors race to cool you down fast, using ice IVs or cold water immersion (though not all ERs have that setup). If you bounced back quickly, you likely dodged the worst. But sun exposure can also cause confusion via dehydration and low sodium, especially if you’re just drinking plain water. Blood pressure dips, thyroid issues, or pacemaker problems can make you more vulnerable. First step? Get out of the heat and cool off — then get checked.

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