Reviewed and updated 20 October 2026.
Keeping a home cooler starts with reducing heat entering the space and using available cooling safely. The best approach depends on outdoor conditions, humidity, the building and the people living there.
Reduce heat gain
Use suitable curtains or blinds to limit direct sun through windows. Where practical, reduce unnecessary heat from cooking and appliances during the hottest part of the day.
Open windows when outdoor conditions are cooler and safe. Opening them while outside air is hotter may not improve the room, and air quality or security concerns may change what is appropriate.
Use equipment according to its purpose
Fans can improve comfort in some conditions, but they do not cool a room in the same way as air conditioning. Do not rely on a fan alone during dangerous heat. CDC guidance warns that fans can increase body temperature when indoor temperatures are above 90°F, about 32°C.
Use air conditioning where available and maintain filters according to the manufacturer’s instructions. Portable units need the specified ventilation or exhaust arrangement; an incorrectly installed unit may not perform as expected.
Plan for vulnerable household members
- Check on older adults and people with health conditions.
- Follow medical advice if fluid intake is restricted.
- Keep pets supplied with water and a suitable cool environment.
- Identify an accessible cooler place if the home becomes unsafe.
- Keep necessary medications and contact information available.
Recognize when comfort tips are not enough
Confusion, fainting or other severe symptoms during heat exposure require urgent medical attention. Move to a cooler environment and seek appropriate emergency help rather than waiting for a fan or drink to solve the problem.
Prepare before the next hot period
Check equipment, shading and local heat alerts early. A modest plan made in advance is easier to follow than improvised changes during a power outage or severe heat event.
Source: CDC: Heat and your health.
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Cover photograph: Clay Banks / Unsplash.