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Hot-weather shelter readiness guide

Extreme Heat Cooling Shelter Plan Without Reliable Power

Extreme heat can make a home unsafe even when the building is intact. The plan needs a cool destination, transportation, communication, hydration, and early relocation triggers.

Read the guide
Field sequence

Build the household cooling plan

  1. 01

    Identify two air-conditioned destinations and how to confirm they are open, reachable, and appropriate for medical, mobility, child, and pet needs.

  2. 02

    Monitor official HeatRisk or local warnings and the actual indoor temperature instead of relying on how the room “feels.”

  3. 03

    Keep drinking water, medicines, light clothing, wet cloths, charging, contacts, and transportation supplies ready to move.

  4. 04

    Reduce heat gain with safe shading and closed windows when outside air is hotter; ventilate only when conditions and air quality support it.

  5. 05

    Move early when the home cannot stay safe—especially for older adults, infants, pregnancy, chronic disease, limited mobility, or medication risks.

Cooling decision

Match the action to conditions

ConditionActionEscalation
Air conditioning worksUse the coolest safe occupied area and limit heat-producing activitiesCheck vulnerable people frequently
Power failsActivate backup communication and transport; confirm cooling destinationRelocate before indoor heat overwhelms the household
Indoor temperature under 90°FCDC says fans may be used with hydration and other coolingContinue monitoring; fans do not lower body temperature in every condition
Indoor temperature above 90°FCDC warns a fan can increase body temperatureUse air conditioning or move to an air-conditioned location
Heat illness signsMove to a cool place, cool the body, and get help based on severityCall 911 for suspected heat stroke
Decision support

Cooling plans fail at the edges

Transportation

A cooling center is not a plan unless someone can reach it before heat illness begins.

Medication and equipment

Heat, refrigeration loss, and powered-device failure require a clinician-informed continuity plan.

Air quality

Opening windows may worsen smoke or pollution exposure. Check both temperature and air-quality guidance.

Pets

Confirm animal access or alternate care. Never leave a person or animal in a parked vehicle.

Primary references

Extreme heat shelter references

Shelter guidance and product instructions can change. Recheck official sources and follow local authorities, emergency services, and current manufacturer instructions.

Common questions

Extreme heat shelter FAQ

Is a fan enough during extreme heat?

Not always. CDC advises fans only when indoor temperatures are below 90°F and recommends air conditioning or an air-conditioned location when hotter.

How do I find a cooling location?

CDC recommends dialing 2-1-1 or contacting local health or emergency-management agencies, and checking current official information.

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