Natural gas continues flowing to your home during most power outages, but many gas appliances need electricity to actually operate. The gas itself arrives through pressurized pipelines that largely run independent of the local electrical grid. Whether you can use that gas depends on the specific appliance and how it ignites and controls the flame.
Gas Supply Usually Stays On
Natural gas pipelines rely mostly on gas-powered compressor stations to keep fuel moving through the system. Only about 10% of US compressor stations are electrically powered, so a regional power outage rarely interrupts the gas supply reaching your neighborhood. Your gas meter doesn’t need electricity either. In practical terms, gas will almost certainly still be available at your appliances during a typical outage.
The real question is whether each appliance can do anything with that gas once it arrives.
Gas Stovetops: Usually Yes
Most gas cooktops and range burners will work during a power outage with a small workaround. Modern stoves use electronic ignition to create the spark that lights each burner, and that spark won’t fire without electricity. But gas still flows to the burner when you turn the knob, so you can light it manually with a long match or a lighter. Hold the flame near the burner, then turn the knob to release gas.
One exception: if your range has a control lock feature that was engaged before the power went out, no gas will flow to the burners at all. The lockout stays active even after power returns until you manually disable it.
Gas Ovens: No
The oven portion of a gas range will not work during a power outage, even if the stovetop burners do. This catches many people off guard. Unlike stovetop burners, a gas oven’s ignition system and gas valve both require electricity to operate. There’s no safe way to manually light a modern gas oven. The electronic safety controls that regulate temperature and prevent gas from flowing unburned simply won’t engage without power, so the valve stays shut.
Gas Furnaces: No
A gas furnace will not heat your home during a power outage. Even though the fuel source is gas, the system depends on electricity for several critical functions: the electronic ignition or control board that starts the burner, the blower motor that pushes warm air through your ducts, and the thermostat that tells the system when to cycle on. A standard furnace blower motor draws around 400 watts per hour, and a variable-speed model uses about 75 watts. Without power to run these components, the furnace sits idle.
If you have a portable generator with enough capacity, you can power the furnace. But simply having gas available does nothing on its own.
One important safety note: never use a gas oven or stovetop to heat your home. Burning gas in an unvented space produces carbon monoxide, a colorless, odorless poison. The CDC specifically warns against heating a house with a gas oven or using any unvented gas appliance as a space heater.
Gas Water Heaters: It Depends on the Type
This is where the answer splits sharply based on what kind of water heater you have.
Traditional tank water heaters with a standing pilot light work without electricity. They rely entirely on mechanical and thermal processes: a small flame stays lit continuously, and when the water temperature drops, a thermocouple triggers the gas valve to open. No circuit board, no outlet, no problem. You’ll have hot water as long as there’s still heated water in the tank.
Newer tank models with electronic ignition need electricity to fire the igniter and won’t operate during an outage without a battery backup or generator.
Tankless (on-demand) water heaters require electricity for their circuit boards, flow sensors, and exhaust fans. They will not produce hot water during an outage. Manufacturers like Rinnai publish approved battery backup units specifically for this purpose, so if you live in an area with frequent outages, a small uninterruptible power supply (UPS) can keep a tankless heater running for a limited time.
Power-vent and direct-vent tank models also need electricity to run their exhaust fans and electronic controls, so they won’t function without backup power.
Gas Fireplaces: Check Your Valve Type
Gas fireplaces with a millivolt valve system will work during a power outage. These systems use a thermopile, a small device attached to the pilot light that converts heat into a tiny electrical current. That current is enough to open the gas valve without any connection to your home’s electrical system. If you have a standing pilot light on your gas fireplace, it’s likely a millivolt system.
Gas fireplaces with electronic ignition or those controlled by a smart thermostat or wall switch wired to your home’s electrical panel will not operate without power. If you’re unsure which type you have, check your owner’s manual or look for a pilot light. A continuously burning pilot flame is the hallmark of a millivolt system.
Quick Reference by Appliance
- Gas stovetop burners: Work with manual lighting (match or lighter)
- Gas oven: Will not work
- Gas furnace: Will not work
- Traditional tank water heater with pilot light: Works normally
- Tankless or electronic-ignition water heater: Will not work without backup power
- Gas fireplace with millivolt valve: Works normally
- Gas fireplace with electronic ignition: Will not work
- Gas dryer: Will not work (motor and controls are electric)
Keeping Gas Appliances Running
If you want gas appliances to function during outages, a portable generator or whole-house standby generator is the most reliable option. For individual appliances like a tankless water heater, a UPS battery backup designed for that specific unit can provide limited runtime. Rinnai, for instance, lists approved backup batteries that keep their tankless heaters producing hot water for a set period during an outage.
The general pattern is straightforward: the older and simpler the appliance, the more likely it works without electricity. Standing pilot lights and mechanical thermostats don’t care about the power grid. Electronic ignition, digital controls, blower motors, and exhaust fans all need watts to function, regardless of whether the fuel itself is gas.