Every year after a major hurricane hits South Florida, the local news runs the same headlines: families found dead in their homes from carbon monoxide poisoning. Not from the wind. Not from the flooding. From the generator they put in the garage, on the back porch, or too close to a window because they didn't want it to get stolen or rained on.
After Hurricane Irma in 2017, more Floridians died from carbon monoxide than from the storm itself. The pattern repeats every season. The deaths are entirely preventable, but only if homeowners understand how generators kill and what the safe practices actually are.
This guide is for Miami, Fort Lauderdale, Boca Raton, and Palm Beach homeowners who already own (or are about to buy) a portable or standby generator. It covers the safety practices that matter, the ones that don't, and the response when something goes wrong.
How carbon monoxide actually kills
A portable gasoline generator produces hundreds of times more carbon monoxide than an idling car. The CO is colorless, odorless, and tasteless. It bonds to hemoglobin in the blood with about 200 times more affinity than oxygen, displacing oxygen and starving organs.
Symptoms of mild CO exposure:
- Headache.
- Dizziness.
- Nausea.
- Confusion.
- Drowsiness.
Symptoms of serious CO exposure:
- Loss of consciousness.
- Seizure.
- Cardiac arrest.
- Death within minutes.
The lethal part is the progression. A family running a generator on the porch may feel slightly tired or get a headache, attribute it to storm stress, lie down, and never wake up. CO acts on the brain in a way that makes the victims unable to recognize what's happening.
Detectable CO levels rise fast in a closed space. A generator in an attached garage with the door closed can produce lethal CO in under 10 minutes. Even with the garage door open, CO can pool inside the house if the wind isn't actively pushing it away.
The single most important rule: generators outside, far from openings
The single rule that prevents almost every generator death:
A portable generator must be operated outdoors, on a level surface, at least 20 feet from any window, door, or vent in the house.
That distance matters. Less than 20 feet and wind can push the exhaust into the house through any opening. Open windows, partially open doors, dryer vents, attic vents, soffits — all of them are entry paths for CO.
Specifically not safe:
- In an attached garage, even with the garage door open.
- In a basement, even an open basement.
- On a screened porch.
- In a carport.
- Under an overhang of the house.
- In a shed or other enclosed outbuilding.
- Near an open window or door.
If you can't place the generator at least 20 feet from the house, you cannot run it safely. Buying a generator and not having a safe location to run it is the same as not having a generator.
Standby (permanent) generators are different
Standby generators that are professionally installed by a licensed electrician are a different category of risk:
- They run on natural gas or propane (cleaner-burning than gasoline).
- They're installed outside on a concrete pad, typically 5+ feet from any door/window per code.
- They're vented away from the home.
- They have automatic transfer switches that handle the power switching without the homeowner running extension cords.
A properly installed standby generator is significantly safer than any portable. If you have the budget and you stay through hurricane season, a standby ($8K–$15K installed) is worth the investment.
CO detectors: not optional in a hurricane home
Every South Florida home with a generator (portable or standby) needs working CO detectors:
- At least one on every level of the home.
- One outside every sleeping area.
- Battery-backup models because power may be out when you need them most.
- Test monthly. Replace batteries twice a year. Replace the detector every 5–7 years per manufacturer spec.
Combination smoke/CO detectors count, but verify the CO sensor is current. CO sensors have a shorter life than smoke sensors.
After every hurricane, every family running a generator should have CO detectors active and audible. The CO detector alarming is your only warning before the symptoms kill you.
Fuel storage and handling
A few rules around fuel that prevent the second-most common generator disaster — fire:
- Store gasoline in approved, sealed containers (red, ANSI-approved gas cans). Not in milk jugs.
- Keep fuel storage outdoors, away from the house, away from electrical equipment, away from heat sources.
- Don't refuel a hot or running generator. Shut it off, let it cool 15 minutes, then refuel. Gas spilled on a hot engine ignites.
- Don't store more than a few days of fuel in unprotected containers. Gas degrades and goes stale. Use a fuel stabilizer for longer storage.
- Don't store fuel inside the home for any reason.
For natural gas standby generators, this is mostly moot — they tap your utility gas supply directly.
Electrical safety: backfeed kills lineworkers
A portable generator powering your home through extension cords is the normal setup. A portable generator hard-wired into your home's electrical panel without a proper transfer switch can backfeed power onto the utility grid, electrocuting lineworkers who are trying to restore service.
Critical rules:
- Never connect a portable generator directly to your home's wiring without a properly installed transfer switch.
- Don't plug a generator into a wall outlet (suicide cord or double-male cords). This is dangerous and in many jurisdictions illegal.
- Use heavy-gauge extension cords rated for outdoor use, matched to the equipment's amp draw.
- Don't run cords through windows or doors that close on them — pinched cords short and start fires.
- Don't overload the generator. Match your load to its rated continuous wattage (not peak).
The safest portable setup is a manual transfer switch professionally installed at the panel. Cost is around $400–$1,500 plus electrician labor. It's worth it.
What appliances actually need to run during a power outage
Prioritization matters because you only have so much generator capacity:
Essential (5,000–7,000W typically):
- Refrigerator and freezer (cycling, 400–1,200W intermittent)
- A few lights
- Phone and device chargers
- Window AC unit or portable AC for one room (1,500–2,500W)
Important if available:
- Modem and Wi-Fi router
- Television or radio for storm tracking
Nice to have:
- Microwave
- Coffee maker
- Larger AC or central air (typically requires a much larger generator)
A 7,500W portable generator handles essentials. A 9,000–12,000W can typically run central air for a smaller home. Whole-home backup for a typical 2,500-square-foot Florida home generally needs a 20,000W+ standby.
Hurricane-specific generator preparation
Three weeks before hurricane season (or now if you haven't):
- Service the generator. Change oil, replace air filter, change spark plug, drain old fuel.
- Test under load. Don't wait until the storm.
- Buy fuel and stabilizer. Store properly.
- Verify CO detectors are working. Replace batteries.
- Locate a safe 20-foot-from-house operating position. Plan how you'll route extension cords.
- Buy heavy-gauge cords matched to your equipment.
- Know the manual cycling for fuel — most generators need to be shut off, refueled, and restarted every 8–12 hours.
When the storm hits:
- Don't start the generator during the storm. Wait until conditions are safe.
- Set it up in the designated safe location before connecting anything.
- Run a CO check after startup. Walk through the house with the CO detector, verify no rising levels.
- Refuel safely. Shut off, cool, refuel, restart.
- Bring it back in or secure it before the next storm.
What to do if you suspect CO poisoning
If anyone in the house experiences headache, dizziness, nausea, or confusion while a generator is running:
- Get out of the house immediately. Everyone. Outside. Now.
- Call 911. Don't try to drive yourself.
- Leave doors and windows open as you exit.
- Don't go back in until first responders have cleared the home and CO levels are safe.
- Get medical attention even if symptoms seem to resolve. CO has delayed effects on the brain and heart.
A CO alarm is the only reliable warning. Symptoms come too slowly and too gradually for most people to recognize the danger in time.
When to call RestoFlo
If a generator-related fire or CO event has damaged your South Florida home, call us. We handle smoke and soot remediation, structural drying if firefighting or runoff is involved, and reconstruction. We work directly with your insurance carrier.
24/7 emergency line: (754) 289-4815.
