Extreme heat
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Move to air conditioning or a designated cooling space, reduce exertion and drink water regularly unless your clinician restricts fluids. Confusion, collapse or seizures in heat can mean heat stroke: call emergency services and start rapid cooling.
Take it with you. Verify locally.
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In immediate danger, contact local emergency services. Current instructions for your location take priority.
Do now.
- 01
Find a cooler place
Use air conditioning, a public cooling center or another safe indoor location.
- 02
Reduce heat load
Rest, loosen unnecessary clothing and use cool wet cloths or a cool shower.
- 03
Check on others
Older adults, infants, outdoor workers and people with illness may need help. Never leave anyone or pets in a parked vehicle.
- 04
Recognize an emergency
For altered mental status or collapse, call emergency services and cool the person while waiting; do not give drinks to someone unable to swallow.
Next steps.
Plan activities for cooler hours and follow heat alerts. Arrange safe transport before the home becomes dangerously hot.
Watch for.
Heat stroke can occur with sweating. Do not wait for dry skin.
Sources & context.
Original Osprey Zero summary of the references below. U.S.-based guidance unless noted; check authorities where you are. This page is not a live alert.
Updated 2026-10-02. Recheck official instructions during an active event.