Most outage advice assumes the lights come back in a few hours. Then an ice storm takes down transmission lines, and suddenly your neighborhood is on day four with no clear restoration date. The difference between a household that shrugs through a week without power and one that ends up in a shelter is almost never money. It is preparation done in layers, weeks before the storm had a name.
This guide walks through preparing your home for extended outages of 3 to 14 days: water, food, power, heat, light, communication, medical needs, sanitation, and the house itself. None of it requires a bunker mentality.
Quick Answer: The Extended Outage Essentials
- Water: 1 gallon per person per day, minimum 3 days, ideally 14.
- Food: 3 days of no-cook food, then a camp stove or grill with fuel for days 4-14. Manual can opener required.
- Power: Build in tiers: power banks for phones, a portable power station for the fridge and medical devices, a generator with a fuel plan for endurance.
- Heat or cooling: Pick one room to live in. Indoor-safe heaters or window management, never charcoal or generators indoors.
- Communication: A weather radio, offline maps downloaded, and the habit of texting instead of calling.
- Home protection: Drip faucets in freezing weather, a sump pump battery backup, and unplug electronics before power is restored.
Why Multi-Day Outages Are Becoming More Common
The average American household experiences noticeably more outage hours per year than a decade ago, driven by two forces. The grid is aging, with much of the U.S. transmission infrastructure built in the 1960s and 1970s and operating beyond its design life while demand keeps climbing. And extreme weather events (the cause of most major outages) have grown more frequent and intense, producing damage that takes crews days or weeks to repair, not hours.
The practical takeaway: planning for a 4-hour outage is planning for the past. Prepare for 3 days as the baseline and 14 days as the stress test.
Layer 1: Water
Water outranks everything else. The standard is 1 gallon per person per day for drinking and basic cooking, more in hot climates. A family of four targeting one week needs 28 gallons: about $25 of supermarket bottled water, stored under beds and in closets.
- Well pumps run on electricity. If your home is on a well, no power means no water at all. Store extra, and consider making the pump a priority generator load (most 240V well pumps need a transfer switch and a 4,000W+ generator).
- You have hidden reserves. A standard water heater holds 40-50 gallons of usable water, and you can fill bathtubs before a forecasted storm. Treat these as sanitation backup.
Layer 2: Food
Think of food in two phases. Days 1-3 are no-cook days: canned beans, tuna, fruit, peanut butter, crackers, nuts, granola bars, shelf-stable milk. Nothing that requires refrigeration, boiling, or more than a manual can opener, because the first days of a major outage are chaotic.
Days 4-14 are camp cooking days. A two-burner propane camp stove (roughly $40-80) with a few 1-pound canisters, or a grill with a full 20-pound tank, turns a pantry of rice, pasta, oats, and canned goods into real meals. All of this cooking happens outdoors or in a very well-ventilated space, because every fuel-burning appliance produces carbon monoxide.
Stock what you already eat and aim for about 2,000 calories per adult per day. Coffee, tea, and chocolate are morale supplies, not luxuries.
Layer 3: Power, Built in Tiers
Nobody needs to power a whole house for two weeks. You need to power the right things, and a tiered approach does that at a fraction of the cost of a standby generator.
- Tier 1: Power banks (roughly $20-50 each). Two or three 20,000mAh power banks, kept charged, run the household’s phones for 3-4 days. Phones are the information lifeline, so this tier comes first.
- Tier 2: A portable power station (roughly $400-1,200 for 500-2,000Wh). Silent, safe indoors, zero maintenance. It cycles the refrigerator, runs medical devices, powers lights, and recharges Tier 1. Add a 200W folding solar panel and it never runs dry on sunny days.
- Tier 3: A portable generator (roughly $500-1,000 for a dual-fuel inverter model). The endurance layer for days 3-14: it recharges the power station and runs the fridge and freezer directly. Dual-fuel matters because propane stores indefinitely while gasoline degrades, and gas stations without power cannot pump fuel.
- The fuel plan is part of the tier. Running a 2,000W inverter generator 6 hours per day uses roughly 1-1.5 gallons of gasoline or 2-3 pounds of propane. A 7-day plan means storing around 10 gallons of stabilized gasoline, or two full 20-pound propane tanks.
One rule overrides everything here: generators run outdoors only, at least 20 feet from the house with the exhaust pointed away, never in a garage. Carbon monoxide from generators kills people after major storms with grim regularity.
Layer 4: Heat and Cooling Without the Grid
The one-room strategy is the core move in both seasons. Conditioning a whole house without grid power is hopeless; conditioning one room is very achievable. Pick a room with few exterior walls, close its doors, and concentrate people and bedding there.
In winter: hang blankets over the doorway and windows of your chosen room, layer clothing, and share body heat (a family in one room keeps it 10-15°F warmer). A propane heater rated for indoor use, with an oxygen depletion sensor and a cracked window for ventilation, holds a bedroom comfortable on about 1 pound of propane per 3-4 hours. Never use a charcoal grill, camp stove, or oven for heat, and put fresh batteries in your carbon monoxide detector.
In summer: reverse the logic. Live in the lowest, shadiest room, open windows at night to flush heat, then close windows and blinds by mid-morning to trap the cool. A box fan on a power station uses only 40-80 watts and dramatically improves how hot air feels. Heat hits elderly household members hardest, so check on them often.
Layer 5: Light and Morale
Candles cause a spike in house fires during every major outage. Skip them. LED headlamps (one per person, roughly $10-15 each), a couple of lanterns, and spare batteries deliver better light with zero fire risk and leave both hands free.
Morale is a real preparedness category on day four. Cards, board games, downloaded movies, and books turn a grim stretch into something closer to camping.
Layer 6: Communication
- A NOAA weather radio (roughly $20-40) keeps official information flowing when cell networks fail.
- Text, do not call. Texts use a tiny slice of network capacity and often get through when calls will not. Agree on an out-of-area contact who relays family news.
- Download before you need it: offline maps, key documents, and your utility’s outage app. Screenshot important phone numbers.
- Stretch phone batteries: low-power mode, airplane mode between checks, brightness down. A phone managed this way lasts 2-3 days.
Layer 7: Medical Needs
Anyone who depends on refrigerated medication, a CPAP, an oxygen concentrator, or other powered equipment needs a written plan. Keep a 7-day supply of prescriptions, know how many watt-hours your devices need per day, and size your Tier 2 power station accordingly. Register with your utility’s medical needs program for outage priority. Insulin users have a fallback: most insulin remains usable at room temperature for about 28 days, and an insulated cooler with cold packs bridges the gap.
Layer 8: Sanitation
If water pressure fails, toilets still work: pour about a gallon of non-potable water (pool water, rain, bathtub reserve) directly into the bowl and it flushes. Store trash bags, wipes, and hand sanitizer, with a camp-style bucket toilet as the deep fallback. Hygiene discipline matters, because a stomach bug during a two-week outage is a genuine emergency.
Layer 9: Protecting the House Itself
- Winter pipes: If indoor temperatures approach freezing, open cabinet doors under sinks, let faucets drip, and know where your main shutoff valve is. If you evacuate, shut off the main and drain the lines.
- Sump pump: Homes with sump pumps flood during exactly the storms that cause outages. A battery backup system (roughly $150-400) is cheap insurance against a flooded basement.
- Surge on restoration: Power often returns with voltage fluctuations. Unplug computers, TVs, and appliances during the outage, leave one lamp on as your indicator, and plug things back in gradually once power is stable.
- Refrigerator discipline: Closed doors keep a fridge safe about 4 hours and a full freezer about 48. Cycling the fridge 15 minutes per hour on a power station holds it.
Layer 10: Neighborhood Coordination
The best-prepared street beats the best-prepared house. Learn which neighbors have generators, chainsaws, or medical training, and who is elderly or fragile. During a long outage, one generator can recharge five households’ power stations in an afternoon, and one grill can cook for three families before freezer meat spoils. A group text thread set up in advance is all the infrastructure this layer needs.
Summer vs. Winter: Same Framework, Different Priorities
In summer, the killer risks are heat illness and food spoilage, so priorities shift toward cooling one room, fans, extra water (closer to 1.5-2 gallons per person per day), and aggressive refrigerator management. In winter, the killer risks are hypothermia, carbon monoxide, and frozen pipes, so priorities shift toward the heated room, safe heaters, pipe protection, and fuel storage, with the consolation that the porch becomes free refrigeration.
Worked Example: A 7-Day Winter Outage, Day by Day
An ice storm hits a family of four on a Sunday night in January. They have the layered plan: 30 gallons of water, two weeks of food, a camp stove, a 1,000Wh power station with a solar panel, a dual-fuel generator with two propane tanks, an indoor-safe heater, headlamps, and a weather radio.
- Day 1: Power fails at 9 p.m. Outage time noted, fridge doors stay shut, everyone sleeps in the master bedroom with the indoor-safe heater on low and a window cracked. Faucets set to drip.
- Day 2: Utility estimates 5-7 days. The family consolidates into the living room, hangs blankets over the doorways, and moves perishables into a cooler on the 28°F porch. Generator runs 7-9 a.m. to recharge the power station and run the fridge. No-cook breakfast, camp stove chili for dinner.
- Days 3-5: The rhythm locks in. Generator runs twice daily, about 2 hours per session, burning 4-5 pounds of propane per day. The power station carries lights and devices between sessions, and the solar panel adds 300-500Wh on sunny afternoons. Toilets get flushed with melted snow, evenings are board games under lanterns, and the family recharges the elderly neighbor’s phone each morning.
- Day 6: The first propane tank runs empty, right on schedule; the second takes over with 2-3 days of margin. A neighbor’s truck makes a supply run for bread and a propane top-up as insurance.
- Day 7: Power returns at 4 p.m. The indicator lamp lights up, they wait 20 minutes for voltage to stabilize, then plug in appliances one at a time. The freezer reads 20°F, so nothing is lost. Total cost of the week: about $30 of propane.
No hotel, no shelter, no spoiled food, no burst pipes. That outcome was purchased months earlier, one layer at a time.
Your Printable Prep Checklist
- Water: 1 gallon/person/day for 7-14 days; tub liner; extra if on a well
- Food: 3 days no-cook + pantry staples; manual can opener; camp stove + fuel
- Power: 2-3 power banks; power station (500Wh+); generator + 7 days of fuel; solar panel
- Heat/cool: indoor-safe heater or box fan; blankets; CO detector with fresh batteries
- Light: headlamp per person; 2 LED lanterns; spare batteries; no candles
- Comms: NOAA weather radio; offline maps; out-of-area contact agreed
- Medical: 7-day medication supply; device watt-hour math done; utility medical registry
- Sanitation: trash bags, wipes, sanitizer, bucket toilet fallback
- House: know the water main; sump pump backup; surge plan (unplug, lamp indicator)
- Neighborhood: group text created; skills and equipment mapped
Frequently Asked Questions
How much water do I really need for a two-week outage?
The standard is 1 gallon per person per day, so a family of four needs 56 gallons for 14 days. In practice, most households store 7 days of bottled water and cover the second week with reserves: the 40-50 gallons in the water heater, a filled bathtub, and purification tablets for treating other sources.
What size generator do I need for a multi-day outage?
For most homes, a 2,000-2,500W inverter generator covers the essentials (refrigerator, freezer, device charging, lights, a fan or small heater) while sipping roughly 1-1.5 gallons of gasoline per 6-hour day. Go bigger (4,000W+) only if you must run a well pump or window air conditioner. Whatever the size, the fuel plan matters more than the wattage.
Is it safe to heat a room with a propane heater indoors?
Only with a heater specifically rated for indoor use, which includes an oxygen depletion sensor and tip-over shutoff, and only with a window cracked plus a working carbon monoxide detector in the room. Outdoor-only heaters, charcoal, camp stoves, and generators must never be used inside, garage included.
Should I prepare differently for summer versus winter outages?
The framework is identical, but the emphasis flips. Summer adds extra water, fans, and a plan for cooling one room, because heat illness is the main danger. Winter adds safe heating, pipe protection, and more stored fuel, because hypothermia and frozen plumbing are the main dangers. Prepare for winter in a cold climate and you are about 90% prepared for summer; the reverse is not true.
This article is for general information only. Follow manufacturer instructions for all generators, heaters, and fuel-burning equipment, never operate them indoors unless the device is explicitly rated for indoor use, and consult local emergency management guidance for hazards specific to your region.