The Complete Power Outage Checklist: Before, During & After
Updated: March 15, 2026
A solid power outage checklist can mean the difference between a minor inconvenience and a full-blown emergency. Whether you live in an area prone to hurricanes, ice storms, or summer heat waves, losing electricity is not a question of “if” but “when.” Our team put together this complete guide covering everything you need to do before, during, and after a power outage to keep your family safe and comfortable.
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- Before: Build a 72-hour supply kit, prepare backup power, install surge protectors, and create a family communication plan.
- During: Report the outage, unplug sensitive electronics, keep the fridge closed (refrigerated food stays safe for about 4 hours if the door stays shut), and run generators outdoors only.
- After: Check food temperatures (throw out perishable food that has been above 40°F for more than 2 hours), reset appliances one at a time, and restock your supplies.
- Key rule: When in doubt about food safety, throw it out.
Contents
- 1 Before a Power Outage
- 2 During a Power Outage
- 3 After Power Returns
- 4 Power Outage Checklist by Duration
- 5 Printable Power Outage Checklist
- 6 Recommended Products
- 7 Frequently Asked Questions
Before a Power Outage
Preparation is what separates a stressful blackout from a manageable one. The time to get ready is long before storm season hits. Here’s what to have in place.
Build Your Emergency Supply Kit
FEMA recommends a 72-hour emergency kit, but extended outages can last a week or more. Start with the basics and build from there:
- Water: One gallon per person per day, minimum 3-day supply. A family of four needs at least 12 gallons stored.
- Non-perishable food: Canned goods, peanut butter, crackers, granola bars, dried fruit. Don’t forget a manual can opener.
- Flashlights and lanterns: At least two per household. Avoid candles because of fire risk. Stock extra batteries.
- NOAA weather radio: A hand-crank model works even when batteries die. This is your lifeline for storm updates when cell towers go down.
- First aid kit: Include bandages, antiseptic, pain relievers, and any personal medical supplies.
- Medications: Keep a 7-day supply of all prescription medications. Refill early when storms are forecasted.
- Cash: ATMs and card readers don’t work without power. Keep $200-$500 in small bills.
- Power bank: A 20,000mAh portable charger can charge a smartphone 4-5 times. Keep it fully charged.
- Important documents: Copies of insurance policies, IDs, and medical records in a waterproof bag.
- Pet supplies: Food, water, medications, carriers, and leashes for at least 3 days.
Store everything in one location that every family member knows about. A large plastic tote in a closet or garage works well. Check expiration dates every 6 months.
Prepare Your Backup Power
This section is where your power outage checklist goes becomes much more practical for longer outages. Having a generator or battery backup system means you can keep your refrigerator running, your sump pump working, and your family warm or cool depending on the season.
Do You Need a Generator?
Not every household needs one, but a generator becomes a real necessity when any of these apply:
- You rely on a sump pump to prevent basement flooding
- Someone in the household depends on medical equipment (CPAP, oxygen concentrator)
- You have a well pump (no city water backup)
- Outages in your area regularly last 8+ hours
- You live in a region with extreme heat or cold
For a detailed breakdown of what different generator sizes can handle, check our guide on what a 5500-watt generator will run or use our generator sizing calculator.
Portable vs. Standby Generators
| Feature | Portable Generator | Standby Generator |
|---|---|---|
| Cost | $400 – $2,500 | $8,000 – $16,000+ installed |
| Power Output | 2,000 – 12,000 watts | 7,500 – 22,000+ watts |
| Fuel | Gasoline, dual fuel (gas/propane) | Natural gas or propane (continuous supply) |
| Startup | Manual (pull cord or electric start) | Automatic (turns on within 10-30 seconds) |
| Best For | Occasional outages, renters, budget-conscious | Frequent outages, whole-home power, medical needs |
| Installation | No installation needed | Professional installation required |
For most households, a portable dual fuel generator in the 4,000-7,500 watt range covers the basics at a reasonable cost. Our 100-amp service sizing guide can help you determine the right size for your home’s electrical panel.
Priority Appliances Wattage Table
Use this table to calculate your minimum power needs. Add up the running watts of everything you want to power simultaneously, then account for the highest surge wattage.
| Appliance | Running Watts | Surge Watts | Priority Level |
|---|---|---|---|
| Refrigerator | 150W | 400W | Critical |
| Sump Pump (1/3 HP) | 800W | 1,500W | Critical |
| Furnace Blower | 500W | 750W | Critical |
| Chest Freezer | 100W | 300W | High |
| Lights (LED, 5-6 rooms) | 200W | 200W | High |
| WiFi Router + Modem | 30W | 30W | High |
| Phone Charger | 25W | 25W | High |
| Window AC Unit | 1,200W | 1,800W | Comfort |
| Space Heater | 1,500W | 1,500W | Comfort |
| Well Pump (1/2 HP) | 1,000W | 2,100W | Critical (if on well) |
Example: Running a refrigerator (150W), sump pump (800W), furnace blower (500W), lights (200W), WiFi (30W), and phone charger (25W) totals about 1,705 running watts. A 4,000-watt generator handles this with plenty of headroom for surge loads. See our deep freezer sizing guide for more detail on keeping frozen food safe.
Transfer Switch: Why It Matters
A transfer switch connects your generator to your home’s electrical panel safely and legally. Without one, you are limited to running extension cords from the generator to individual appliances. Worse, connecting a generator to your panel without a transfer switch (called backfeeding) is extremely dangerous and can electrocute utility workers restoring power.
Our guide on generator backfeeding explains exactly why this is so hazardous. For safe installation options, see our backup generator installation guide.
Fuel Storage and Maintenance
- How much fuel? A typical 5,000-watt generator burns about 0.75 gallons per hour at 50% load. For a 24-hour outage, that means roughly 18 gallons. Our 5-gallon runtime guide breaks down fuel consumption by generator size.
- Fuel stabilizer: Untreated gasoline starts degrading after 30 days. Add fuel stabilizer to every can and run treated fuel through the generator during testing. Old gas is one of the top reasons generators won’t start when you need them most.
- Storage safety: Store gasoline in approved containers away from living areas, water heaters, and ignition sources. Keep a maximum of 25 gallons at home (check local fire codes for your area).
- Test before storm season: Run your generator under load for 30 minutes at least once every 3 months. This keeps the carburetor clean and confirms everything works. New generators also need a proper break-in procedure before relying on them.
Rain and Weather Protection
Generators must stay dry while running, but they also need proper ventilation. Never run a generator inside a garage, even with the door open. A generator canopy, steel running cover, or purpose-built enclosure keeps rain off while allowing exhaust to escape. For full details, read our guide on running a generator in the rain.
Protect Your Home
- Surge protectors: Plug sensitive electronics (computers, TVs, gaming consoles) into quality surge protectors. Whole-house surge protectors installed at the breaker panel provide even better protection. Power surges are common when electricity is restored. Learn more in our guide on making a generator safe for electronics.
- CO detectors: Install carbon monoxide detectors on every level of your home and near sleeping areas. Battery-operated or battery-backup models are a must since hardwired detectors stop working during outages.
- Know your breaker panel: Label every breaker clearly. Know which breaker controls the refrigerator, furnace, sump pump, and well pump. This knowledge saves valuable time during emergencies.
- Prevent frozen pipes: During winter outages, pipes can freeze within hours. Know where your main water shutoff is. Keep faucets at a slow drip to prevent freezing. Insulate exposed pipes in the basement and crawl spaces before winter arrives.
Family Communication Plan
Cell towers have battery backup that typically lasts 4-8 hours. After that, communication may be limited.
- Designate an out-of-area contact person everyone calls or texts
- Keep a written list of emergency phone numbers (you won’t have your contacts list without a charged phone)
- Agree on a meeting location outside the home
- Make sure everyone knows how to manually open the garage door
- Download your utility company’s outage map app while you still have internet
- Teach older children how to use the weather radio
During a Power Outage
The power just went out. Here’s what to do, step by step.
First 5 Minutes
- Check your breaker panel. A tripped breaker is not a utility outage. If you see a tripped breaker, reset that breaker once by switching it fully off and then back on. If your utility provides a specific main-breaker reset procedure, follow that guidance. When that doesn’t fix it, move to step 2.
- Look outside. Are your neighbors’ lights off too? Streetlights out? This confirms a utility outage rather than a problem with your home’s wiring.
- Report the outage. Call your utility company or use their app. Early reports help crews find the problem faster.
- Unplug sensitive electronics. Computers, TVs, and gaming consoles can be damaged by power surges when electricity returns. Leave them unplugged until power has been stable for a few minutes.
- Leave one light switched on. This is your visual signal that power has been restored, especially at night.
Food Safety Rules
Food safety is one of the most overlooked parts of any power outage checklist. The USDA guidelines are clear:
| Appliance | Safe Duration (Door Closed) | Key Detail |
|---|---|---|
| Refrigerator | 4 hours | Temperature must stay below 40F |
| Full Freezer | 48 hours | Stays cold longer when packed full |
| Half-Full Freezer | 24 hours | Fill empty space with water jugs before storm season |
Rules to follow:
- Keep the fridge and freezer doors closed. Every opening drops the temperature significantly.
- Eat perishable foods first (dairy, leftovers, deli meats).
- Place a thermometer inside both the fridge and freezer now, before you need it.
- Group frozen items together. A packed freezer retains cold much longer than a sparse one.
- Move the most perishable fridge items into the freezer once the outage stretches past 2 hours.
Running Your Generator Safely
- Placement: Outdoors only, 20+ feet from the house, with the exhaust pointed away from any openings. Never in a garage, basement, crawlspace, or enclosed patio.
- Connection: Use a transfer switch or heavy-duty, outdoor-rated extension cords sized for the appliance load and cord length; the cord’s amp rating must meet or exceed the connected load. Run cords through a window or door, not through walls.
- NEVER backfeed: Plugging a generator directly into an outlet without a transfer switch sends electricity back through the grid and can kill utility workers. This is illegal in most areas.
- Prioritize loads: Don’t run everything at once. Stagger high-draw appliances. Start the refrigerator first, wait for the compressor to settle (about 2 minutes), then add the next appliance. Read our overloaded generator guide for load management tips.
- Refuel safely: Turn the generator off and let it cool for at least 5 minutes before adding fuel. Gasoline spilled on a hot engine or exhaust can ignite instantly.
- CO detectors: Keep battery-powered CO detectors active inside the home. Even with outdoor placement, wind shifts can push exhaust toward the house.
Having trouble getting your generator started? Check our guides on cold-weather starting, generators that keep shutting off, and generators with no power output.
Without a Generator
Millions of people ride out power outages every year without a generator. Here’s how to manage:
- Use coolers: Transfer fridge and freezer contents to coolers packed with ice once the outage passes the 4-hour mark. Block ice lasts longer than cubes.
- Warming and cooling centers: Most communities open public shelters during extended outages. Libraries, community centers, and schools often serve as cooling stations in summer and warming stations in winter.
- Charge devices in your car: Run the engine for 15-20 minutes at a time with a USB car charger. Keep the car in the driveway (never in the garage) to avoid CO buildup.
- Conserve phone battery: Switch to airplane mode when you don’t need data. Lower brightness. Close background apps. Disable location services.
- Fill bathtubs with water: This water is for flushing toilets, not drinking. Each flush uses about 1.6 gallons.
Staying Comfortable
Winter Outages
- Close off unused rooms and gather everyone in one area
- Layer clothing: thermals, fleece, wool socks, knit hat (you lose significant heat through your head)
- Use sleeping bags rated for cold temperatures
- Hang blankets over windows for extra insulation
- Never use a gas stove or oven to heat your home, and never use a charcoal grill or propane heater indoors.
Summer Outages
- Open windows on opposite sides of the house for cross-ventilation
- Stay on the lowest floor (heat rises)
- Drink water frequently, even before feeling thirsty
- Use battery-powered fans or hand fans
- Wet a bandana or towel and drape it around your neck
- Watch for heat exhaustion signs: heavy sweating, weakness, nausea, dizziness. Move to a cooler area and hydrate immediately.
After Power Returns
The lights are back on. Before returning to normal, complete these steps.
Check Food Safety
This is the part most people skip, and it can lead to serious foodborne illness.
- Check the thermometer: Perishable food in the fridge that stayed above 40°F for more than 2 hours should be discarded.
- Freezer check: Food that still contains ice crystals or is at 40F or below can be safely refrozen. Anything that thawed completely and sat above 40F for more than 2 hours must go.
Always discard these items when above 40F for 2+ hours:
- Raw or cooked meat, poultry, and fish
- Milk, cream, soft cheeses
- Opened baby formula
- Cooked pasta, rice, potatoes
- Casseroles, soups, stews
- Cut fruits and vegetables
- Deli meats and hot dogs
These items are usually safe:
- Hard cheeses (cheddar, parmesan, Swiss)
- Butter and margarine
- Condiments (ketchup, mustard, relish)
- Bread, bagels, tortillas
- Fruit juice (opened)
- Peanut butter and jelly
Reset Your Home
- Turn on appliances one at a time. Turning everything on simultaneously can cause a voltage spike or trip your breaker. Start with the refrigerator, wait a minute, then add the next appliance.
- Check for water damage. Inspect the basement, look around windows, and check near the sump pump. Frozen pipes may have cracked during a winter outage, so run every faucet briefly to check for leaks.
- Reset clocks and timers. Thermostat, oven, microwave, irrigation system, security system.
- Restock your emergency supplies. Replace any food, water, batteries, or fuel you used. Do it immediately while the experience is fresh.
Generator Shutdown and Storage
- Turn off all connected loads before shutting down the generator
- Let the generator run unloaded for 2-3 minutes to cool the engine
- Turn off the fuel valve and let the carburetor run dry (prevents stale fuel buildup)
- Allow the generator to cool completely before storing
- Add fuel stabilizer to any remaining gasoline in the tank and fuel cans
- Log the hours run. This helps you track maintenance intervals for oil changes and spark plug replacement
- Store the generator in a dry, ventilated area away from living spaces
Power Outage Checklist by Duration
The right response depends on how long the power has been out. Use this power outage checklist as a quick reference based on duration.
| Duration | Priority Actions | Food Safety | Generator Use |
|---|---|---|---|
| Short (1-4 hours) | Report outage, unplug electronics, use flashlights | Keep fridge and freezer closed. Food is safe. | Usually not needed |
| Medium (4-24 hours) | Start generator (if available), conserve phone battery, check on neighbors | Fridge food becomes risky after 4 hours. Eat perishables or transfer to coolers with ice. | Run 2-4 hours to cycle fridge/freezer, then rest |
| Extended (1-3 days) | Full emergency plan active, manage fuel supply, heating/cooling plan | Freezer safe 24-48 hours. Discard questionable fridge food. Cook what you can. | Run 6-8 hours/day. Cycle on/off to conserve fuel. |
| Prolonged (3+ days) | Fuel resupply plan, consider evacuation, check community resources | Most fridge food lost. Focus on freezer, canned goods, and non-perishables. | Fuel management critical. Calculate daily burn rate and available supply. |
Printable Power Outage Checklist
Save or print this condensed checklist so it’s ready when you need it.
POWER OUTAGE CHECKLIST
BEFORE (Prepare Now)
- ☐ 72-hour water supply (1 gallon/person/day)
- ☐ Non-perishable food + manual can opener
- ☐ Flashlights + extra batteries
- ☐ NOAA weather radio (hand-crank)
- ☐ First aid kit + 7-day medication supply
- ☐ Cash ($200-$500 in small bills)
- ☐ Power bank (fully charged)
- ☐ Generator tested and fuel stored with stabilizer
- ☐ Transfer switch installed (or heavy-duty extension cords ready)
- ☐ Surge protectors on sensitive electronics
- ☐ CO detectors with fresh batteries on every level
- ☐ Breaker panel labeled
- ☐ Family communication plan in place
- ☐ Important documents in waterproof bag
- ☐ Pet supplies for 3+ days
DURING (When Power Goes Out)
- ☐ Check breaker panel first
- ☐ Report outage to utility company
- ☐ Unplug sensitive electronics
- ☐ Leave one light switched on
- ☐ Keep fridge and freezer doors closed
- ☐ Start generator outdoors, 20+ feet from house
- ☐ Prioritize loads: fridge, sump pump, furnace, lights
- ☐ Conserve phone battery (airplane mode)
- ☐ Check on elderly or vulnerable neighbors
- ☐ Never use grills, camp stoves, or generators indoors
AFTER (Power Restored)
- ☐ Check food temperatures (discard if above 40F for 2+ hours)
- ☐ Turn on appliances one at a time
- ☐ Inspect for water damage and pipe leaks
- ☐ Reset clocks, thermostat, security system
- ☐ Shut down and store generator properly
- ☐ Add fuel stabilizer to remaining gasoline
- ☐ Restock all used emergency supplies immediately
Recommended Products
These are the products our team recommends for power outage preparedness, based on reliability, reviews, and value.
Generators
DuroMax XP12000EH Dual Fuel Portable Generator (~$1,100). 12,000 watts peak, runs on gasoline or propane, and powers most of a home’s critical appliances. Electric start and included wheel kit make it manageable for one person.
Champion 4000-Watt Dual Fuel Inverter Generator (~$850). Produces clean power safe for computers and phones. Dual fuel capability (gasoline and propane), CO Shield auto-shutoff, and 64 dBA operation. Delivers 4,000 starting / 3,000 running watts on gasoline. Great choice for small backup loads where you have a safe outdoor location that meets generator-clearance requirements.
Transfer Switches
Generac 6853 HomeLink 30-Amp Transfer Switch (~$350). Connects directly to your breaker panel and lets you power 8 to 10 essential circuits safely. Requires professional installation.
Reliance Controls 31410CRK Transfer Switch Kit (~$300). A more budget-friendly option that includes the inlet box and cord. Powers up to 10 circuits with a 30-amp connection.
Emergency Supplies
NOAA Emergency Weather Radio (Hand-Crank) (~$30). Receives NOAA weather alerts, charges via hand crank or solar panel, and includes a built-in flashlight and USB charging port. Works when batteries and power are both gone.
Emergency Zone Power Outage Kit (~$30). Includes 2 light sticks, 2 mini LED flashlights, a collapsible LED lantern, and waterproof matches in a durable nylon pouch.
Anker Zolo 20,000mAh Portable Power Bank (~$30). Charges a smartphone 4-5 times. Built-in USB-C cable means one less thing to pack. Keep it charged and in your emergency kit at all times.
Fuel and Maintenance
STA-BIL Storage Fuel Stabilizer (8 oz) (~$8). Keeps gasoline fresh for up to 24 months. Add it to every fuel can and to the generator’s tank before storing. An 8 oz bottle treats up to 20 gallons.
Frequently Asked Questions
How long does a typical power outage last?
Most power outages in the U.S. last between 1 and 4 hours. However, outages caused by major storms, hurricanes, or ice storms can last anywhere from several days to over a week. EIA reported that the average U.S. customer experienced about 11 hours of power interruptions in 2024, though this varies widely by region and utility provider.
Should I turn off my breaker during a power outage?
You don’t need to turn off the main breaker for a short outage. However, unplugging sensitive electronics (computers, TVs, gaming consoles) protects them from power surges when electricity is restored. For extended outages lasting more than a few hours, switching off individual breakers for large appliances and turning them back on one at a time after power returns reduces the risk of tripping the main breaker from simultaneous startup surges.
Can I run my generator in the rain?
Yes, but you need to protect the generator from direct rain. Use a manufacturer-approved running cover, a generator tent, or a steel canopy designed for your model. Never wrap the generator in a tarp while running because this blocks airflow and traps exhaust. Most generator warranties do not cover water damage, so protection is worth the investment. Read our complete guide on running a generator in the rain for detailed options.
What size generator do I need for my house?
For most homes, a 4,000 to 7,500 watt portable generator covers the basics: refrigerator, freezer, sump pump, furnace blower, lights, and phone charging. To power central air conditioning or an electric water heater, you’ll need 10,000+ watts or a whole-house standby unit. Add up the running wattage of all appliances you want to power simultaneously, then add 20% for surge loads. Our generator sizing calculator walks you through this step by step.
How much fuel should I store for a power outage?
Plan for at least 2-3 days of generator runtime. A typical 5,000-watt generator at 50% load burns about 0.75 gallons per hour. Running it 8 hours per day means you’ll need about 6 gallons daily, or 18 gallons for 3 days. Store gasoline in approved containers with fuel stabilizer added. Most local fire codes limit residential gasoline storage to 25 gallons, so check your area’s regulations.
How long will my food last without power?
A closed refrigerator keeps food safe for about 4 hours. A full freezer holds its temperature for approximately 48 hours (24 hours if half full). Once food rises above 40F for more than 2 hours, perishable items should be discarded. Condiments, hard cheeses, butter, and unopened items with high acid or sugar content generally remain safe longer. When in doubt, throw it out.
A well-prepared power outage checklist takes less than a weekend to put together, and it protects your family for years. Start with the emergency kit and work your way through the backup power section. The best time to prepare was last year. The second best time is today.