Hurricane & Storm Power Outage Checklist: Fuel, Safety, Generator Prep

Every hurricane season, the same pattern plays out: the storm track firms up 72 hours out, gas stations run dry 48 hours out, and the people who prepared are calm while everyone else is in a checkout line buying the last generator at the big-box store — the one without an instruction manual because the box was a floor model.

This is the checklist that separates those two groups. It’s organized in three phases: before the storm (the 72-hour window), during the outage, and after power comes back. And it leads with the thing that kills people every single year: carbon monoxide.

The one rule that matters most: carbon monoxide

A running generator produces carbon monoxide — odorless, colorless, and lethal. Every hurricane season, people die running generators in garages, under windows, or too close to the house. CO from a generator can build to fatal levels in minutes in an enclosed space, and it can drift through an open garage door, a cracked window, or a vent intake into living space.

The rules are non-negotiable:

Run the generator at least 20 feet from the house, with the exhaust pointed away from the building. This is the CDC and CPSC guidance — not a suggestion.
Never in a garage, even with the door open. Never in a basement, shed, carport with low clearance, or under a deck. An open garage door does not make it safe — CO accumulates faster than it ventilates.
Keep it away from windows, doors, and any air intake vents (including the neighbor’s).
Install battery-powered CO detectors on every floor of your home, and check the batteries before storm season. A $30 detector is the cheapest life insurance you own.
If a CO alarm sounds, get everyone outside immediately and call 911. Don’t go back in to “check the generator.” Don’t open windows first and stay inside. Out first, then call.

If you remember nothing else from this article, remember this: 20 feet, exhaust away, never inside any structure, CO detectors with fresh batteries.

Safety disclaimer: this article is general guidance, not a substitute for professional advice. Generator installation, transfer switches, and any wiring into your home’s electrical panel must be done by a licensed electrician. If you’re unsure about anything electrical or fuel-related, hire a pro before the storm — not during it.

Phase 1: Before the storm (72 hours to landfall)

Fuel — buy it early, store it right

Fuel is the thing that runs out first — not at your house, at the stations. Panic buying empties gas stations 24–48 hours before landfall, and stations without power can’t pump after the storm either.

How much do you need? Do the math for your generator:

Generator type	Typical fuel burn (half load)	72-hour fuel need (half load)
5,500W portable (gasoline)	~0.6–0.8 gal/hr	~45–55 gallons
7,500W portable (gasoline)	~0.8–1.0 gal/hr	~60–70 gallons
9,500W portable (gasoline)	~1.0–1.2 gal/hr	~70–85 gallons
22 kW standby (natural gas)	Unlimited (piped)	—
22 kW standby (propane)	~2.5–3.5 gal/hr	200–250 gallons in tank

Most portable-generator owners don’t actually run at half load for 72 straight hours — you’ll cycle the generator (run it for the fridge, shut it down overnight, run it for cooking). Realistic planning: figure 8–12 hours of runtime per day for a portable, which cuts that 72-hour number roughly in half. But plan for the full number and be pleasantly surprised, not the other way around.

Gasoline storage rules:

Use only approved fuel containers (the red DOT/OSHA cans), 5 gallons each. Store them in a ventilated area away from the house — a detached shed or garage corner away from ignition sources, never in living space.
Add fuel stabilizer (Sta-Bil or equivalent) at fill time. Untreated gasoline starts degrading in about 30 days; stabilized fuel lasts 12–24 months depending on the product. Write the date on the can with a marker.
Rotate your stock. The practical system: every 6 months, pour the stored gas into your car’s tank (it’s perfectly fine for a car) and refill the cans fresh with stabilizer. Tie it to something you’ll remember — daylight saving time changes work well.
Don’t store gasoline in the house, near the water heater, or anywhere a pilot light or spark could reach it. Gasoline vapor is heavier than air and travels along the floor to ignition sources.

Propane users: check your tank gauge now, not the day before landfall. Propane companies get swamped before storms and may not deliver for days after. If you’re below 40%, call for a fill. A 22 kW standby burns roughly 2.5–3.5 gallons of propane per hour at typical loads — a 500-gallon tank filled to 80% (400 usable gallons) gives you roughly 115–160 hours of runtime. Do your own math against your expected outage length.

Diesel users: diesel stores far better than gasoline — 12+ months without stabilizer, longer with it — but water contamination is the enemy. Keep tanks full (less air = less condensation), use a biocide treatment if you store long-term, and keep spare fuel filters on hand. A clogged filter during an outage is a preventable failure.

Generator prep — the pre-storm service

Do this before the storm is 48 hours out, because small-engine shops will have a line out the door:

Start it and run it under load for 15–20 minutes. Not just “it started” — put a real load on it (a space heater or a couple of power tools, 50%+ of rated watts). Generators that “ran fine last year” fail under load with clogged jets, weak spark, or a governor that won’t hold RPM. Finding out now means you can fix it; finding out during the outage means you’re in the dark.
Check the oil. If it’s due (or you can’t remember the last change), change it now — oil, filter, air filter. Keep a spare quart of the right oil, a spare air filter, and a spare spark plug with the generator. These are $20 in parts that prevent a dead generator on day two.
Test the transfer switch or interlock. If you have a manual transfer switch, flip it through its positions and confirm the generator actually feeds the panel. If you have an interlock kit, verify the interlock plate moves freely and the generator breaker works. Corroded or stiff transfer switches are a common “worked last year” failure.
Standby owners: check that the unit’s weekly self-test has been running (look at the controller display for the last test date and any fault codes). Check the battery — if it’s over 2–3 years old, replace it before storm season, not after it fails. Confirm your propane level or natural gas service.
Extension cords: if you’re running a portable on cords, lay them out now. You need heavy-duty outdoor-rated cords, 12-gauge minimum for runs over 25 feet or loads over 1,500W. That orange 16-gauge cord from the junk drawer will overheat running a fridge and a space heater. Count your cords, check for damage, and make sure you have enough length to reach 20+ feet from the house to where the generator will sit.

The house — what to unplug and stage

Unplug sensitive electronics or put them on surge protectors: TVs, computers, routers, gaming consoles. Power often flickers on and off as the grid fails and as crews restore it — those surges kill electronics. A whole-house surge protector at the panel ($200–$400 installed by an electrician) is the real fix; point-of-use protectors are the backup plan.
Turn your fridge and freezer to their coldest settings 24 hours before landfall. A colder thermal mass buys you hours. Freeze water bottles or fill zip bags with water and freeze them — they act as ice blocks and give you drinking water as they melt.
Charge everything: phones, laptops, battery banks, rechargeable lanterns, power tool batteries. A 20,000 mAh power bank holds roughly 4–5 phone charges — have two.
Fill bathtubs and large containers with water if you’re on a well (no power = no pump) or if water service is likely to be disrupted. This is for flushing and washing, not drinking — keep drinking water separate (1 gallon per person per day, 3-day minimum).
Know your main breaker. If you have a portable generator feeding the panel through a transfer switch or interlock, you must isolate from the grid — that’s what the transfer equipment does. Never backfeed by plugging a generator into a wall outlet (“suicide cord”). It energizes the lines outside your house and can kill a lineworker trying to restore power. It’s also illegal in most jurisdictions. If you don’t have a transfer switch or interlock installed by an electrician, run extension cords — that’s the safe way.

Phase 2: During the outage

Running the generator

Placement: 20+ feet from the house, exhaust pointed away, on dry level ground. If it’s raining, the generator needs shelter from direct rain — but “shelter” means an open-sided canopy or a purpose-built generator tent, never an enclosed space. A simple popup canopy with the sides off works. Keep the generator itself dry; water in the outlets or panel is a shock and failure risk.
Refueling — the cool-down rule: shut the generator off and let it cool for 10–15 minutes before refueling. Spilling gasoline on a hot muffler is how fires start. This is the second-most-common generator injury after CO poisoning. Never refuel a running generator, no exceptions. Keep a fire extinguisher (ABC-rated) near the generator station.
Runtime cycling: you don’t need to run a portable 24/7. A practical cycle: run 3–4 hours in the morning (fridge recovery, cooking, charging), shut down midday, run 3–4 hours in the evening. This stretches fuel dramatically. Your fridge only needs the generator a few hours at a time to stay safe (see below).
What NOT to plug in: anything with a heating element draws enormous power — space heaters (1,500W each), electric water heaters (4,500W), electric dryers (5,000W+), ovens. One space heater can eat a third of a 5,500W generator’s capacity. Prioritize: fridge, freezer, well pump or sump pump, a few lights, phone chargers, and medical devices. Everything else is a luxury — do the watt math before you plug it in.
Wet conditions: never operate a portable generator in standing water, and don’t touch it with wet hands. If the generator gets soaked in a storm surge or flood, don’t restart it until it’s been inspected — water in the windings or panel is a shock hazard and will destroy the unit.

Fridge and food — the 4-hour rule

A closed fridge keeps food safe for about 4 hours without power. A full freezer holds temperature for about 48 hours (24 hours if half-full) as long as you don’t open it.
Keep the doors shut. Every opening dumps cold air. Decide what you need, grab it fast, close the door. Tape a “DO NOT OPEN” note on it if you have kids.
After 4 hours without power (and without generator cycling), perishable food — meat, dairy, leftovers — should be discarded. “When in doubt, throw it out” isn’t being wasteful; food poisoning during a disaster, when hospitals are overwhelmed and water may be unsafe, is genuinely dangerous. A food thermometer reading 40°F or below means it’s still safe.
Running the generator 3–4 hours twice a day keeps a fridge safely cold indefinitely. Put a thermometer in the fridge so you’re managing by temperature, not by guesswork.

Carbon monoxide vigilance during the outage

CO detectors on, batteries fresh, on every floor. If you only have one, put it in the hallway outside the bedrooms.
Symptoms of CO poisoning — headache, dizziness, nausea, confusion, weakness — are easy to dismiss as stress and exhaustion during a storm. If multiple people feel sick at once, treat it as CO until proven otherwise: everyone outside, call 911.
Never bring the generator “just inside” because of rain or theft. Every year, people who know the rules break them for one night because of weather or worry about theft. Chain the generator to something solid instead — a $30 cable lock beats a funeral.

Sump pumps and basements

If you have a basement and the storm is bringing heavy rain, the sump pump is load priority #1 — above the fridge. A dead sump pump during a multi-inch rain event floods basements fast. If your generator can’t run the sump pump and the fridge simultaneously, alternate them — but don’t leave the sump pump off for more than an hour during heavy rain. A battery-backup sump pump ($300–$500) is cheap insurance that covers the gap when the generator is off or out of fuel.

Phase 3: After the storm

Post-storm generator maintenance

Your generator just did the hardest work of its life. Don’t just roll it back into the garage:

Change the oil after any extended run (check your manual — most portables want fresh oil every 50–100 hours; after a 3-day outage at 10 hrs/day, you’re due).
Clean or replace the air filter. Storm air is full of dust and debris; a clogged filter chokes the engine.
Inspect for damage: check cords for nicks, the frame for cracks, the fuel system for leaks. Look at the outlets for corrosion if it ran in rain.
Run it dry or stabilize. If you’re putting it away: either run the carburetor dry (shut the fuel valve and let it run until it dies — prevents varnish in the carb, the #1 “won’t start next year” cause) or fill the tank with stabilized fuel. Pick one; don’t do neither.
Standby owners: check the controller for fault codes or warnings logged during the outage, check oil level, and confirm the unit returned to standby mode. Schedule the annual service if it’s due.

Restocking

Refill fuel cans within a week or two, while stations are normal. Restabilize, re-date.
Replace any CO detector batteries you burned through, and replace detectors themselves if they’re past their rated life (most are 7–10 years — check the manufacture date on the back).
Replace used extension cords that got damaged. Restock the spare oil, filter, and spark plug you used.
Refill propane if a standby drew the tank down — don’t discover you’re at 20% when the next storm forms.

The “while it’s fresh” review

Every outage teaches you something. Write it down within a week: Ran out of extension cord length. Needed more gas — used 40 gallons, had 25. The sump pump and fridge couldn’t run together. The neighbor’s generator was quieter — what model was that? Fix the gaps now, when parts are in stock and electricians have openings. The next storm won’t wait for you to get around to it.

The 72-hour shopping list (if you’re starting from zero)

For the homeowner who just realized they’re unprepared and the storm is three days out:

Generator sized to your actual loads (see sizing guidance — don’t buy blind)
4–6 five-gallon fuel cans + fuel stabilizer
Heavy-duty 12-gauge outdoor extension cords (enough to reach 20+ ft from house)
Battery-powered CO detectors (one per floor minimum)
20,000+ mAh power banks (two)
ABC fire extinguisher
Spare oil, air filter, spark plug for your generator model
Cable lock and chain for the generator
Drinking water: 1 gallon/person/day × 3 days minimum
Battery or crank lanterns + headlamps (hands-free light is underrated)

Buy the generator first — they sell out first. Everything else can be found at a hardware store in one trip.