Reference — Emergency Nursing
Heat & Cold Illness Prevention Reference
Most heat and cold emergencies are predictable and preventable. Knowing who is vulnerable — and which medications quietly sabotage thermoregulation — is what turns nursing care into prevention.
Educational use only. Prevention guidance is general; tailor it to the individual’s conditions, medications, and environment, and follow public-health advisories during extreme weather. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Who Is at Risk
| Group | Why |
|---|---|
| Older adults | Impaired thermoregulation and thirst, chronic illness, polypharmacy, social isolation, no AC/heat |
| Infants & young children | Immature thermoregulation, high surface-area-to-mass ratio, can't act for themselves (hot cars!) |
| Athletes & outdoor laborers | High heat production, push through symptoms, dehydration; cold exposure for outdoor workers |
| People experiencing homelessness | Prolonged exposure, limited shelter, intoxication, comorbidities |
| People with chronic illness | Cardiac, endocrine, neurologic disease and obesity impair heat/cold handling |
Medications That Impair Thermoregulation
- •Anticholinergics & antihistamines — impair sweating (heat risk)
- •Antipsychotics — impair thermoregulation (heat and cold)
- •Diuretics — volume depletion (heat risk)
- •Beta-blockers — blunt cardiovascular response
- •Stimulants/sympathomimetics — increase heat production
- •Alcohol — vasodilation/heat loss (cold) and impaired judgment (both)
Prevention Teaching
Heat: hydrate before thirst, rest in shade/AC, avoid peak-heat exertion, wear light loose clothing, acclimatize gradually, never leave anyone in a parked car, and check on isolated older neighbors during heat waves.
Cold: dress in layers and stay dry, cover head/hands/feet, limit alcohol outdoors, recognize early signs (shivering, numbness, clumsiness), and use warming shelters; ensure safe home heating (and CO detectors).
Community role: heat-wave and cold-snap advisories, wellness checks, and connecting vulnerable patients to cooling/warming resources are nursing prevention work.
NCLEX Pearls
- ✦Highest-risk: older adults, infants, athletes/laborers, people experiencing homelessness, the chronically ill.
- ✦Anticholinergics, antipsychotics, and diuretics raise heat-illness risk; alcohol worsens both heat and cold injury.
- ✦Acclimatize gradually to heat; hydrate before thirst; never leave a child or pet in a car.
- ✦Cold prevention: layers, stay dry, cover extremities, limit alcohol, and watch for early shivering/numbness.
- ✦Prevention and community checks during extreme weather are part of the nursing role.
Related Resources
Standards & sources
Fact-checked Jun 20, 2026This page is written to align with Emergency Nurses Association (ENA) · AHA ACLS / PALS Guidelines · Advanced Trauma Life Support (ATLS). It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →