Power Outage Prep Checklist: What to Do Before, During, and After an Outage

When the power goes out, preparation is everything. A complete power outage prep checklist covers three phases: before (assembling backup power, supplies, and safety gear), during (preserving food, managing medical devices, and staying safe), and after (inspecting equipment, restocking supplies, and reporting outages). Start with a 72-hour backup supply as recommended by FEMA’s 2024 Power Outage Preparedness Guide, and always install carbon monoxide detectors before using any combustion generator. Follow this step-by-step checklist to keep your family safe and comfortable through any outage.

What Should You Do Before a Power Outage to Prepare?

Preparation begins weeks or months before the lights go out. Your goal is to have all equipment tested, supplies stocked, and safety protocols in place so you don’t scramble in the dark. The core recommendation from FEMA’s 2024 Power Outage Preparedness Guide is to prepare for at least 72 hours without electricity — enough time for most utilities to restore power or for emergency crews to reach your area.

1. Assess Your Backup Power Needs

Every home is different. Start by listing essential devices you must keep running: refrigerators, freezers, well pumps, sump pumps, medical equipment (CPAP, oxygen concentrators), and communication devices. Check each device’s wattage rating on its nameplate or in the manual. According to medical device manufacturers like ResMed and Philips Respironics, CPAP machines typically draw 30–60 watts, while oxygen concentrators from Inogen or Philips can draw 200–600 watts. Sum these wattages to determine the minimum capacity you need from a generator or battery system.

2. Choose Your Backup Power Source

Compare the main options using this table:

Backup Power Type	Typical Output	Runtime (full load)	Fuel / Energy	Key Considerations
Portable Generator (gasoline/propane)	2,000–12,000 watts	8–12 hours per tank	Gasoline, propane, dual‑fuel	Requires outdoor placement, CO detector, fuel storage. Best for short‑term outages.
Standby Generator (permanent)	7,000–20,000 watts	Unlimited (connected to natural gas)	Natural gas or propane	Professional installation, automatic transfer switch. Ideal for long outages.
Battery Backup (home battery, e.g., Tesla Powerwall, EcoFlow Delta Pro)	2,000–15,000 watts	5–24 hours (rechargeable with solar)	Grid or solar panels	Silent, no fumes. Limited runtime without solar. Good for brief outages or medical devices.
Solar Generator (portable battery + panels, e.g., Goal Zero Yeti, Jackery Explorer)	500–3,000 watts	Variable (dependent on sunlight)	Solar + battery	Silent, renewable. Slower recharge. Best for minimal loads and off‑grid use.

According to the National Fire Protection Association (NFPA), carbon monoxide detectors are mandatory in any home using a combustion generator indoors or in a garage. Place detectors on every level and near bedrooms.

3. Build a Comprehensive Emergency Kit

Your kit should include items that keep you safe and comfortable for 72+ hours. FEMA’s 2024 guide recommends these items:

• Flashlights (one per person) with extra batteries
• Battery‑powered or hand‑crank NOAA weather radio (e.g., from Midland or Kaito)
• First‑aid kit (comprehensive, with prescription medications for 3 days)
• Bottled water (1 gallon per person per day for 3 days)
• Non‑perishable food (canned goods, protein bars, dry cereal)
• Manual can opener
• Cash (ATMs may be down)
• Phone power banks (fully charged)
• Fire extinguisher (rated for electrical fires)
• Extra blankets and warm clothing (winter outages)

4. Plan for Medical Devices

If you rely on electrically powered medical devices, consult the device manual or your healthcare provider for exact wattage and backup needs. Keep backup batteries or a dedicated small generator for critical life‑support equipment. According to the American Red Cross, notify your local utility in advance about medical dependency; many utilities prioritize restoration for medically vulnerable customers.

5. Protect Food and Water

The USDA advises that a full freezer keeps food safe for 48 hours without power, while a half‑full freezer lasts only 24 hours. To extend that time, freeze water bottles in advance to create ice packs. Keep refrigerator doors closed as much as possible — a refrigerator maintains safe temperatures for about 4 hours if unopened. Also stock up on bottled water or fill clean containers before a storm.

What Steps Should You Take During a Power Outage?

When the power goes out, follow a calm, systematic approach to preserve food, manage medical needs, and stay safe. Do not use any combustion appliances indoors unless you have working carbon monoxide detectors in your home.

1. Confirm the Outage and Report It

First, check whether the outage is limited to your home. If neighbors have power, check your breaker panel. If the outage is widespread, report it to your utility company (e.g., Duke Energy, Pacific Gas & Electric, or your local provider). Most utilities have online outage maps or phone lines. Reporting helps them prioritize restoration.

2. Preserve Food and Refrigeration

Open the refrigerator and freezer doors only when necessary. The USDA recommends using a cooler with ice for items you need frequently. Keep a thermometer inside the refrigerator; if the temperature rises above 40°F for more than 2 hours, discard perishable foods. For freezers, if items still contain ice crystals they are safe to refreeze or cook.

3. Use Backup Power Safely

If you have a portable generator, place it outside at least 20 feet from doors and windows to prevent carbon monoxide poisoning. Never run it in a garage or basement. Use heavy‑duty, outdoor‑rated extension cords. If you have a standby generator, it will automatically switch on after a few seconds. For battery backups like a Goal Zero Yeti or EcoFlow, simply plug essential devices into the unit. Keep your backup power’s fuel or charge level in mind: for a gasoline generator, calculate runtime based on your load.

4. Manage Medical Devices

If you use a CPAP, oxygen concentrator, or other electric medical device, switch to battery backup immediately. ResMed and Philips devices often have internal batteries that last one or two nights—have an external battery pack ready. For oxygen concentrators, have a spare tank or a portable unit like the Inogen One G5 that can run on batteries for a few hours. If you cannot maintain power, go to a designated emergency shelter with backup power.

5. Stay Informed

Use a battery‑powered NOAA weather radio for updates on storm progression and restoration times. The National Weather Service broadcasts alerts on specific frequencies. Also use your phone sparingly to conserve battery; send texts instead of make calls. Follow your utility’s social media accounts for real‑time updates.

What Must You Do After Power Is Restored?

Once the lights come back on, take these steps to ensure your equipment and food are safe, and restock your supplies for the next emergency.

1. Check Food Safety

Inspect all refrigerated and frozen food. If the power was out for an extended period, use the USDA guideline: when in doubt, throw it out. Do not taste food to check safety. Throw away any perishable items that have been above 40°F for more than 2 hours. If your freezer still has ice crystals and feels cold, items are likely safe.

2. Inspect Your Generator and Backup Systems

For portable generators, allow the engine to cool before refueling. Check oil levels and perform post‑outage maintenance as recommended by the manufacturer (e.g., Honda, Generac). For battery backups, fully recharge the internal batteries. Solar panels should be wiped clean and inspected for damage.

3. Restock Your Emergency Kit

Replace any used batteries, food, water, and first‑aid supplies. Rotate stock to keep everything within expiration dates. This is a good time to review your backup power needs—did you run out of fuel or battery? Adjust your plan accordingly.

4. Review and Update Your Plan

After each outage, note what worked and what didn’t. Did you have enough water? Was your generator powerful enough? Did your medical device batteries hold out? Update your checklist and consider upgrading your backup power system if necessary. According to the Department of Energy, the frequency of severe weather‑related outages is increasing; investing in a more robust system like a standby generator or whole‑home battery can provide peace of mind for years to come.

Additional Preparedness Tips

• Install surge protectors on sensitive electronics to prevent damage when power returns.
• Keep a corded landline phone—some models work without household power.
• If you have a well pump, consider a portable generator that can power it (typically 1,500+ watts startup).
• For multi‑day outages, have a plan for childcare, pet care, and elderly family members.

By following this complete power outage prep checklist, you transform a stressful emergency into a manageable event. The time you invest now—assembling backup power, supplies, and knowledge—pays dividends when the grid goes down.