• Winter Storm Uri has brought unprecedented snowfall and freezing temperatures to Texas, leaving millions of people at risk.
  • Widespread blackouts have occurred across the state, as surges in demand for heat and electricity have overwhelmed the grid.
  • Households are turning to portable generators to stay warm, but are now running the risk of carbon monoxide poisoning.

In the throes of Winter Storm Uri, Texans have struggled to find safe ways to stay warm. After temperatures plummeted to as low as zero degrees Fahrenheit on Sunday, utilities in Texas cut off power to millions of homes in a bid to reduce the strain on power grids. Days later, hundreds of thousands of people are still without power.

Households are now turning to backup home generators, just as Californians did last summer when utilities shut off power as fires devastated the state. While gas-powered generators provide a quick and efficient way to get warm and establish some sense of normalcy, they also come with a silent, but deadly risk: carbon monoxide poisoning.


The Best Carbon Monoxide Detectors
Carbon Monoxide Alarm
Kidde Carbon Monoxide Alarm
$55 at Amazon
Dual-Power Carbon Monoxide Detector
FIRST ALERT Dual-Power Carbon Monoxide Detector
Onelink Smoke and Carbon Monoxide Detector
FIRST ALERT Onelink Smoke and Carbon Monoxide Detector
Nest Protect: Smoke + Carbon Monoxide
Google Nest Protect: Smoke + Carbon Monoxide

As Texans turn to generators, cars, and ovens for warmth, they're sometimes making life-or-death decisions. Officials in the Houston area confirmed that at least two people have died from carbon monoxide poisoning between Monday and Tuesday, and another 100 became sick from the tasteless, odorless gas, according to The New York Times. And last year, most of the deaths that occurred during the Hurricane Laura natural disaster were due to carbon monoxide poisoning.

✔ Pop Mech Pro: Get exclusive answers to your burning science questions.

That doesn't mean you can't safely run a generator in your home—you just have to be smart about it. We've researched some of the best carbon monoxide detectors you can buy on Amazon (see above), and compiled everything you need to know to safely keep the electricity humming while staying warm.

What Is Carbon Monoxide?

repairman checks carbon monoxide level on gas water heater exhaust
BanksPhotos//Getty Images

Carbon monoxide (CO) is a poisonous—but colorless, odorless, and tasteless—gas, making it difficult to detect without special equipment, according to the Occupational Safety and Health Administration (OSHA), a regulatory agency of the U.S. Department of Labor focused on workplace safety.

Carbon monoxide is usually found mixed with other gases that do have an odor, so it's possible to inhale carbon monoxide along with other nonlethal gases and not even realize its presence. This is especially true while burning material that contains carbon, like natural gas, gasoline, kerosene, oil, propane, coal, or wood.

In industrial settings, blast furnaces and coke ovens produce carbon monoxide, but the dangers exist at home, too. Internal combustion engines, like the one in your car, can produce high levels of carbon monoxide, which is why you'll sometimes see reports of people dying in their car while running the engine in the garage.

Generally, you'll find carbon monoxide fumes any time you burn fuel in a car or truck, small engines, stoves, lanterns, grills, gas ranges, furnaces, or fireplaces, according to the U.S. Centers for Disease Control and Prevention (CDC).


The Best Blankets to Keep You Warm
Sherpa Fleece Blanket
Bedsure Sherpa Fleece Blanket
Credit: Bedsure
Yakima Camp Blanket
Pendleton Yakima Camp Blanket
Credit: Pendleton
Military Wool Blanket
Arcturus Military Wool Blanket
Credit: Arcturus
Sherpa Fleece Bed Blanket
LBRO2M Sherpa Fleece Bed Blanket
Now 35% Off
Credit: LBRO2M

But portable generators may be the worst culprits. According to a North Carolina State University study published in the Journal of the Air & Waste Management Association in 2003, a typical engine powering a 5-kilowatt generator emits a similar amount of carbon monoxide as 450 idling cars.

What Is Carbon Monoxide Poisoning?

Carbon monoxide poisoning occurs when you breathe in dangerous amounts of the gas. It displaces the oxygen in your blood, depriving your heart, brain, and other vital organs of oxygen, according to OSHA. The process can lead to serious tissue damage and even death. This occurs so quickly, you may not even realizing it's happening. You can lose consciousness and suffocate within minutes.

Even if you do catch on in time, carbon monoxide poisoning can have devastating long-term effects, including permanent brain damage, heart damage that could lead to cardiac complications, and fetal death or miscarriage.

What Are the Signs of Carbon Monoxide Poisoning?

According to the Mayo Clinic, there are a few common symptoms that could point to carbon monoxide poisoning. If you're experiencing any of the following, move to a place outside with fresh air and seek medical attention:

  • Dull headache
  • Weakness
  • Dizziness
  • Nausea or vomiting
  • Shortness of breath
  • Confusion
  • Blurred vision
  • Loss of consciousness

Some populations are especially at risk of carbon monoxide poisoning. Unborn babies are more susceptible because fetal blood cells take up carbon monoxide gas more readily than adult blood cells, for example. Young children take more breaths than adults do, which can lead to a higher risk of carbon monoxide poisoning.

Older adults are also more likely to experience brain damage from carbon monoxide poisoning. Additionally, people who have chronic heart disease could get more sick from exposure to the gas, and people who have gone unconscious as a result of exposure could experience severe damage.

How to Safely Use a Generator and Avoid Carbon Monoxide Poisoning

There is a responsible way to use alternate forms of heat generation in an emergency. The most obvious is the portable gas-powered generator. You must follow these tips:

➡️ Never run a generator in an enclosed space: Under no circumstance should you ever run your generator in a garage, utility building, basement, or shed—even if you have a door open! Limit opportunities for carbon monoxide to collect to deadly levels.

➡️ Point the exhaust away from your home: Orient the generator relative to a prevailing wind if you can, so it's down-wind from your house. Use a chain and padlock to secure the generator in place.

➡️ Buy a generator with an automatic shutoff feature: Some generators come with a built-in CO detector that will turn the machine off before the poisonous gas builds to a deadly level. These are more expensive, but you can't put a price on safety.

What About Kitchen Appliances, Grills, and Cars?

If you don't have a generator, steer clear of using your oven, stovetop, grill, car, or propane/kerosene heater to keep warm. Dallas Fire-Rescue warns against using any of these things; a fireplace or a wood-burning stove are much safer options. Always make sure you have ample ventilation inside your home, and remember to install a carbon monoxide detector on every floor of your house—it might just save your life.

Additional reporting by Roy Berendsohn.


The Best Portable Generators

Best Overall
Editor’s Choice
DuroMax XP12000EH Portable Generator
DuroMax XP12000EH Portable Generator

This heavy-duty generator can run on gas or propane for a max of 20 hours.

Best Value
On Sale
Champion 7500-Watt Dual Fuel Portable Generator
Champion 7500-Watt Dual Fuel Portable Generator

Dual Fuel technology lets this generator run on either gasoline (up to 10 hours) or propane (up to 5.5 hours). 

Duel Fuel
DuroMax XP4400EH Dual Fuel Electric Start Portable Generator
DuroMax XP4400EH Dual Fuel Electric Start Portable Generator

With propane at half load, it can run up to 10 hours, while gas will run up to 8. 

Quietest
Amazon’s Choice
56203i 2000-Watt Portable Inverter Generator
56203i 2000-Watt Portable Inverter Generator

For off-the-grid travels, you’ll want a quieter and more portable generator like the Wen.

Best Gas
Durostar DS4400E Gas Powered Portable Generator
Durostar DS4400E Gas Powered Portable Generator

With 4,400 peak watts and 3,500 running watts, this portable generator can handle the lights, refrigerator, AC, or high-amp power tools.

Best Gas
Durostar DS12000EH Portable Generator
Durostar DS12000EH Portable Generator

With 12,000 peak watts and 9,500 running watts, it offers five outlets for powering your home's lights, fridge, AC, and even power tools.

Best Overall
Editor’s Choice
DuroMax XP10000EH Generator
DuroMax XP10000EH Generator

This heavy-duty generator can run on gas or propane for a max of 20 hours.

Best Overall
Editor’s Choice
DuroMax XP12000E Portable Generator
DuroMax XP12000E Portable Generator

This heavy-duty generator runs on gas and has a 457cc OHV engine.

Best Overall
Editor’s Choice
DuroMax XP13000E Generator
DuroMax XP13000E Generator

This heavy-duty generator can run on gas or propane for a max of 20 hours.

Best Gas
On Sale
Westinghouse WGen9500 Portable Generator
Westinghouse WGen9500 Portable Generator

Start up this gas-only generator remotely to run for up to 16 hours.

Best Gas
Best Seller
WGen 7500-Watt Portable Generator
Westinghouse WGen 7500-Watt Portable Generator

Start up this gas-only generator remotely to run for up to 16 hours.

Best Gas
On Sale
Westinghouse WGen7500 Generator
Westinghouse WGen7500 Generator

Start up this gas-only generator remotely to run for up to 16 hours.

Quietest
WEN 56225i 2250-Watt Portable Inverter Generator
WEN 56225i 2250-Watt Portable Inverter Generator

For off-the-grid travels, you’ll want a quieter and more portable generator like the Wen.

Duel Fuel
Pulsar G12KBN Heavy Duty Portable Dual Fuel Generator
Pulsar G12KBN Heavy Duty Portable Dual Fuel Generator

With propane at half load, it can run up to 6 hours, while gas will run up to 12. 

Best Overall
Editor’s Choice
Durostar DS10000EH Portable Generator
Durostar DS10000EH Portable Generator

This heavy-duty generator can run on gas or propane for a max of 20 hours.

Best Overall
On Sale
Durostar DS10000E Portable Generator
Durostar DS10000E Portable Generator

With a maximum of 10,000 watts, this Durostar is one of the most powerful portable generators. Its dual-fuel capability allows it to run on propane or gas. A 20-pound propane tank at 50 percent max output will provide 20 hours of power, and gasoline at 50 percent will run for 10 hours. While it has a user-friendly electric start, recoil start is also optional. This generator’s heavy-duty metal frame will protect it when outside in stormy weather, and the power panel includes individual breakers for safety. 

Duel Fuel
DuroMax XP5250EH Generator

At 4,200 running watts, this generator can run everything from lights to power tools. Dual Fuel technology lets it run on either gasoline or propane, and it automatically shuts off when oil is low. 

Best Overall
Editor’s Choice
Durostar DS4000WGE Portable Generator
Durostar DS4000WGE Portable Generator

This heavy-duty generator can run on gas or propane for a max of 20 hours.

Best Value
Champion 4000-Watt Home Backup Generator
Champion 4000-Watt Home Backup Generator

An affordable and versatile dual-fuel option that’s loaded with user-friendly features.

Best Battery
Yeti 1400 Lithium Portable Power Station
Goal Zero Yeti 1400 Lithium Portable Power Station

This Lithium battery offers a safe alternative to gas-powered generators.

Headshot of Courtney Linder
Courtney Linder
Deputy Editor
Before joining Pop Mech, Courtney was the technology reporter at her hometown newspaper, the Pittsburgh Post-Gazette. She is a graduate of the University of Pittsburgh, where she studied English and economics. Her favorite topics include, but are not limited to: the giant squid, punk rock, and robotics. She lives in the Philly suburbs with her partner, her black cat, and towers upon towers of books.