How to Prepare for a Blackout and Keep Your Household Safe
A blackout can disrupt far more than your lights. Within hours, refrigeration, heating, cooling, phone charging, medical devices, internet service, transportation, stores, and ATMs may stop working. Learning how to prepare for a blackout helps you protect your household without panic buying or guessing what to do next.
Good preparation starts with a household plan, basic supplies, safe food and water practices, and a clear response to extreme temperatures. The guidance below reflects recommendations from FEMA, Ready.gov, the CDC, the American Red Cross, USDA Food Safety, the Consumer Product Safety Commission, and local utility providers.
How to Prepare for a Blackout Before It Starts
Identify risks inside your home
Consider how an outage would affect your home during winter storms, heat waves, wildfires, floods, hurricanes, or planned utility shutoffs. Electric heat, well pumps, sump pumps, elevators, automatic garage doors, powered mobility devices, and medical equipment can create urgent problems.
Choose the safest rooms for hot and cold weather. Locate the electrical panel, water shutoff, gas shutoff, fire extinguisher, and emergency exits. Check whether you already have a generator, home battery, solar charger, or other backup system.
Create a communication and evacuation plan
Choose an out-of-area contact who can relay messages if local phone networks become crowded. Set a meeting place near home and another outside the neighborhood. Plan backup routes for failed traffic lights, closed roads, and stopped public transit.
Keep printed phone numbers, addresses, medical details, insurance information, and prescriptions in a waterproof container. Make plans for children, older adults, people with disabilities, pets, and service animals. Record the locations of nearby hospitals, shelters, cooling centers, warming centers, and community emergency sites.
Sign up for utility outage alerts and local emergency notifications. Save the utility's outage number and website offline, then keep a battery-powered or hand-crank radio ready. Ask your utility about medical baseline programs or priority assistance for residents who depend on powered medical equipment.
Build a Blackout Emergency Kit for Several Days
Store water and ready-to-eat food
The CDC and Ready.gov recommend storing at least one gallon of water per person per day, with a three-day supply as a starting point. Store more for pets, hygiene, medication, and hot weather. If an outage warning arrives, fill clean containers when local officials say the water supply is safe.
Choose foods that need little or no cooking, such as canned meals, shelf-stable milk, nut butter, protein bars, dried fruit, crackers, and ready-to-eat grains. Include infant formula, allergy-safe foods, and meals that fit medical needs. Keep a manual can opener, reusable containers, and disposable utensils nearby.
Keep light, power, health, and hygiene supplies
Store flashlights, headlamps, lanterns, spare batteries, a radio, charged power banks, charging cables, and vehicle chargers where everyone can find them in the dark. Test each item on a regular schedule. Recharge batteries and power banks after every outage.
Add a first-aid kit, essential medicines, blankets, warm clothes, sturdy shoes, work gloves, masks, soap, wipes, sanitizer, toilet paper, menstrual products, trash bags, and disposable gloves. Ask a pharmacist or doctor about backup plans for insulin, refrigerated medicine, oxygen equipment, CPAP machines, and powered mobility devices. Keep small bills, identification, prescriptions, and insurance records with the kit.
Protect Food, Water, and Temperature-Sensitive Supplies
Keep refrigerators and freezers closed
Open refrigerator and freezer doors only when needed. A closed refrigerator usually keeps food cold for about four hours, while a full freezer may hold a safe temperature for about 48 hours, according to USDA Food Safety guidance. A half-full freezer may last about 24 hours.
Group frozen food together and use appliance thermometers when possible. Do not rely on smell or appearance to judge safety. Discard food that stayed above safe temperatures too long, and do not refreeze fully thawed food unless official guidance confirms it remained safely cold.
Manage water, sanitation, heat, and cold
Follow boil-water notices and public health alerts. Treat questionable water only with methods recommended by the CDC or local health department. Avoid drinking from pools, hot tubs, or decorative fountains unless officials confirm a safe treatment method.
During heat, move to the coolest safe room, drink water, wear light clothing, and check on infants, older adults, neighbors, and pets. During cold, layer clothing, close unused rooms, protect exposed pipes, and use blankets. Seek an official cooling or warming center if indoor temperatures become dangerous.
Never use a gas range, charcoal grill, camp stove, vehicle, or fuel-burning heater indoors. Headache, dizziness, nausea, weakness, confusion, heavy sweating, shivering, or trouble speaking can signal carbon monoxide exposure or dangerous heat or cold. Leave and call emergency services when these symptoms appear.
How to Prepare for a Blackout With Safe Backup Power
Operate generators outdoors
Run portable generators outdoors at least 20 feet from the home, doors, windows, and vents. Never use one in a garage, basement, crawl space, shed, porch, or other enclosed area. Point exhaust away from the home and nearby buildings.
Install working carbon monoxide alarms on every level and outside sleeping areas. Let a generator cool before refueling, and store fuel in approved containers away from living spaces and ignition sources. Follow the manufacturer's wattage limits and operating instructions.
Connect power equipment correctly
Never connect a generator directly to a wall outlet. This can cause backfeeding, electrocution, fires, and injuries to utility workers. A qualified electrician should install a transfer switch before a generator supplies household wiring.
Use only manufacturer-approved, heavy-duty outdoor cords, and do not overload them. Prioritize a refrigerator, medical device, heating system, or sump pump instead of trying to power every appliance. For battery stations and solar systems, check both running watts and startup surge needs.
Store lithium-ion batteries away from heat and moisture. Do not use swollen, punctured, recalled, or damaged batteries or charging cables. Recharge backup systems after each outage and inspect them on a regular schedule.
Stay Safe While the Power Is Out
Prevent electrical injuries and home damage
Treat every fallen power line as energized and stay far away. Never touch wet electrical equipment, flooded outlets, or damaged cords. Unplug sensitive electronics to reduce damage from surges, then leave one lamp switched on so you know when service returns.
Use flashlights instead of candles whenever possible. Avoid elevators, keep doors secured, and maintain safe ventilation when needed. If flooding, fire, severe weather, or an official evacuation order makes the home unsafe, leave early using your planned route.
Check on people, pets, and neighbors
Check on older adults, infants, pregnant people, people with disabilities, and anyone who relies on electric medical equipment. Give pets clean water, food, temperature protection, and secure containment. Ask trusted neighbors whether they need medicine, transportation, or help reporting an outage.
Do not enter flooded homes or areas with suspected carbon monoxide. Move people to a cooling center, warming center, shelter, or hospital when home conditions become unsafe. Call emergency services for electrical fires, severe injuries, dangerous temperatures, or urgent medical problems.
Restore Your Home Safely After Power Returns
Inspect the home before normal use
Wait for utility or emergency officials to confirm that service is safe. Turn appliances on gradually and watch for sparks, smoke, burning odors, damaged cords, or odd sounds. Never use electrical equipment exposed to water until a qualified professional inspects it.
Check for burst pipes, leaks, flooding, sewage problems, and damaged utility lines. Report fallen poles, broken transformers, and other hazards to the utility. Keep children and pets away from damaged areas.
Discard unsafe supplies and improve the plan
Throw away food held at unsafe temperatures, then clean and disinfect affected refrigerators, counters, and containers. Ask a pharmacist or healthcare provider before using medicine that became too warm. Photograph damaged food, equipment, and property for insurance records.
Restock water, food, batteries, medicine, and fuel after the outage. Record what failed, which supplies ran out, how long backup power lasted, and whether anyone faced heat or cold stress. Update contacts and routes, then set reminders to test equipment and refresh the kit.
Conclusion: Prepare Before the Lights Go Out
Effective blackout preparation combines a household plan, several days of supplies, safe food and water handling, responsible backup power, and regular check-ins. Start today by signing up for utility alerts, storing water and ready-to-eat food, charging power banks, gathering medicines, and checking carbon monoxide alarms.
Add plans for pets, medical equipment, extreme heat, extreme cold, and evacuation. Keep key information offline, learn your generator's limits, and review the plan after every outage. Current recommendations are available from FEMA, Ready.gov, the CDC, USDA Food Safety, the American Red Cross, the Consumer Product Safety Commission, and your local electric utility.