Power Outage During Extreme Heat: A Practical Preparedness Guide

A power outage is inconvenient at any time. During extreme heat, it can quickly become a health and safety problem—especially when air conditioning stops, refrigerators begin warming and phone batteries run low.

The safest response starts before the electricity fails. A simple plan for cooling, hydration, food, medication and communication can help your household make calm decisions without relying on last-minute shopping or panic.

Why heat-related power outages require a different plan

Power outages during hot weather create several problems at once. Indoor temperatures can rise, refrigerated food and medicine may become unsafe, water demand increases, and local cooling centers or transportation services may become crowded.

The CDC advises people to stay cool, stay hydrated and know the symptoms of overheating. It also notes that fans may not provide safe cooling once indoor temperatures exceed 90°F (32°C). People who are older, very young, pregnant, living alone, working outdoors or managing chronic health conditions may need additional support.

Preparedness is not about predicting exactly when an outage will happen. It is about deciding in advance what you will do if your home becomes too hot to remain safely inside.

1. Make a cooling plan before the power goes out

Identify at least two places you could go if your home becomes dangerously hot. Options may include a cooling center, library, community center, shopping center, hotel or the home of a friend who still has power.

Write down the address, route and operating hours when possible. Do not assume mobile data will work during a widespread outage. Keep a paper copy in your emergency kit.

• Know which household members are most vulnerable to heat.
• Arrange transportation before an emergency if someone cannot drive.
• Check whether local authorities use 211, text alerts or another service to announce cooling centers.
• Plan for pets; many public cooling locations do not accept animals.
• Close blinds or curtains before the hottest part of the day.
• Use the coolest room in the home and limit heat-producing appliances.

If a person develops confusion, fainting, severe weakness or other signs of serious heat illness, seek emergency medical assistance. Do not wait for power to return.

2. Store water—and protect it from heat

Hot weather increases fluid needs, and an outage can affect pumps, treatment systems or access to stores. Keep an emergency water supply for drinking, preparing food and essential hygiene.

Store water in food-grade containers away from direct sunlight, fuel, pesticides and cleaning products. Rotate commercially bottled water according to the manufacturer’s guidance. If local officials issue a boil-water or do-not-use notice, follow that notice even if your stored water appears clear.

• Keep drinking water accessible rather than buried behind other supplies.
• Include reusable bottles that can be carried to a cooling center.
• Store additional water for children, nursing parents, pets and anyone with medical needs.
• Add oral rehydration products only when appropriate for your household and used according to their directions.
• Do not ration drinking water to the point of dehydration.

Water is the first priority. Emergency food does not replace water, and no food product can prevent heat illness when hydration and cooling are inadequate.

3. Build a no-cook emergency food supply

A summer outage is a poor time to depend on foods that require an electric stove, long cooking times or large amounts of water. Build a small no-cook supply from familiar foods your household will actually eat.

• Canned beans, fish, chicken, fruit or vegetables with a manual can opener
• Nut or seed butters, if appropriate for household allergies
• Shelf-stable milk or alternatives
• Crackers, tortillas, granola and ready-to-eat cereal
• Dried fruit, nuts and familiar snacks
• Shelf-stable meals designed to be eaten without heating
• Compact emergency nutrition kept as a backup for situations where space, preparation time or portability is limited

Survival Tabs can serve as one compact component of a broader emergency-food plan. They require no cooking and are easy to store or carry, but they should not displace drinking water, medically necessary foods or the familiar foods your household relies on. Follow the product label for serving and storage information.

4. Protect refrigerated and frozen food

Before an expected outage, lower refrigerator and freezer temperatures, freeze containers of water and group frozen foods together. Appliance thermometers make it easier to judge conditions without guessing.

Once power fails, keep refrigerator and freezer doors closed. A closed refrigerator generally holds a safe temperature for only a limited period, while a full, unopened freezer lasts longer than a half-full one. Time alone is not the only test—temperature matters.

Discard perishable food that has been above 40°F (4°C) for more than two hours, or more than one hour when temperatures are above 90°F (32°C). Never taste food to decide whether it is safe. When in doubt, throw it out.

• Keep a refrigerator/freezer thermometer inside each appliance.
• Write down when the outage began.
• Use coolers with ice or frozen packs for priority items.
• Separate raw meat from ready-to-eat food.
• Do not rely on smell or appearance to detect harmful bacteria.
• After flooding, discard food that contacted unsafe water unless official guidance clearly says it can be kept.

5. Prepare for refrigerated medication and medical devices

Some medications must remain within a specific temperature range, while others can increase sensitivity to heat or dehydration. Ask your pharmacist or healthcare professional what to do before an outage occurs.

Do not stop or change medication because of a power failure unless a qualified healthcare professional instructs you to do so.

• Keep an updated medication list, dosage information and pharmacy contact details.
• Ask how long each temperature-sensitive medicine can remain unrefrigerated.
• Identify a backup location with refrigeration.
• Use a dedicated medication cooler if recommended; avoid direct contact between medicine and ice unless instructed.
• Register with the utility if a household member depends on eligible electrically powered medical equipment.
• Plan backup batteries or power according to the equipment manufacturer and medical provider.

6. Keep communication available

Charge phones, power banks, rechargeable lights and medical-device batteries when extreme heat is forecast. Keep a battery-powered or hand-crank radio for official updates.

During an outage, reduce screen brightness, enable low-power mode and avoid unnecessary streaming. Text messages may go through when voice calls do not. Choose one out-of-area contact who can relay information between family members.

• Download local emergency and utility applications in advance.
• Enable official weather and emergency alerts.
• Keep important numbers and addresses on paper.
• Store charging cables together in the emergency kit.
• Consider a vehicle charger, but never run a vehicle in an enclosed space.
• Agree on a family meeting location if communication fails.

7. Use generators and fuel-burning equipment safely

Portable generators, charcoal grills, camping stoves and other fuel-burning devices produce carbon monoxide. Never operate them inside a home, garage, basement, tent or other enclosed or partly enclosed area.

Follow the manufacturer’s instructions and local fire-safety guidance. Keep generators well away from doors, windows and vents, and make sure working carbon-monoxide alarms are installed in the home. Never use a gas oven to cool or ventilate a room.

A 15-minute summer outage checklist

• Confirm that the outage has been reported to the utility.
• Check indoor temperature and household members at higher risk.
• Close blinds and move to the coolest safe room.
• Fill personal water bottles from the stored supply.
• Keep refrigerator and freezer doors closed.
• Write down the outage start time.
• Switch phones to low-power mode and check official alerts.
• Contact the person who may need assistance.
• Leave early for a cooling location if the home is becoming unsafe.

What to keep in a summer outage kit

• Stored drinking water
• No-cook shelf-stable food
• Manual can opener
• Flashlights or headlamps—never depend on candles
• Power banks and charging cables
• Battery-powered or hand-crank radio
• First-aid supplies and necessary medication
• Appliance thermometers
• Cooling towels, spray bottles and lightweight clothing
• Copies of emergency contacts, routes and medical information
• Small amount of cash
• Supplies for infants, older adults and pets
• Compact emergency nutrition for backup portability, when suitable for your household

Frequently asked questions

How hot is too hot inside a house during an outage?

There is no single indoor temperature that is safe for everyone. Health risk depends on temperature, humidity, duration, airflow, medications, age and health conditions. CDC guidance warns that fans may increase body temperature when indoor conditions exceed 90°F. If someone is becoming ill or your home cannot be cooled, relocate to an air-conditioned place.

Should I open the refrigerator to check the food?

Open it as little as possible. Use an appliance thermometer and the time the outage started to guide decisions. Follow current government food-safety guidance rather than tasting food.

Can I cook indoors with a camping stove?

No. Camping stoves and other fuel-burning equipment can produce deadly carbon monoxide. Use them only outdoors as directed by the manufacturer and local safety authorities.

Where do Survival Tabs fit in this plan?

They can provide a compact, no-cook backup that is easy to store in a household kit, vehicle or evacuation bag. They are one part of a broader plan that must also include water, familiar foods, medical needs and a safe cooling strategy.

The calm-preparedness approach

Extreme heat does not require extreme buying. Start with the basics: a cooling destination, drinking water, a no-cook food supply, medication planning, communication and a safe way to leave if your home becomes too hot.

Review the plan with your household at the beginning of each hot season. Replace expired supplies, recharge batteries and confirm that everyone knows where to go. A small amount of preparation now can prevent rushed decisions during the next outage.