Heat Exhaustion

Signs and Symptoms of Heat Emergencies
Heat Cramps Heat Exhaustion Heat Stroke
Muscle cramps

Normal to mildly elevated temperature


Symptoms seen in heat cramps plus:

Normal to elevated temperature [<40°C (<104°F)]

Nausea, vomiting, headache, malaise, dizziness

Orthostatic hypotension

Symptoms seen in heat exhaustion plus:

Elevated temperature [>40°C (>104°F)]

Neurologic abnormalities: inappropriate behavior, confusion, delirium, ataxia, coma, seizures

Anhidrosis or sweating




  1. Cool environment
  2. Rest
  3. Normal saline PO or IV
  4. May need IV K, Mg, Ca

Disposition / Follow-Up

  1. Excellent prognosis since major organ systems are minimally affected
  2. D/c home after fluids & lytes repleted