How to Shut Off Gas, Water & Power in an Emergency (4 Steps)

TL;DR: Every home has three critical shutoffs: the gas meter valve (quarter-turn clockwise with a wrench), the main water valve (usually near the street or basement entry, turn clockwise), and the main electrical breaker (flip to OFF). Label them now, keep tools nearby, and walk through the steps once a year—during an earthquake, flood, or fire, you won't have time to search.

_Last reviewed: July 2026 · 6 min read_

A pipe bursts at 2 a.m. Water is pooling under the refrigerator. You smell gas after an earthquake. The basement is flooding. In any of these scenarios, you have roughly 60 seconds to act before minor damage becomes catastrophic. Knowing where your gas, water, and power shutoffs are—and how to operate them—turns panic into a checklist.

Okoniq Property Hub lets you log the exact locations of these shutoffs, attach photos, and set annual reminders to test each one.

Where is the main water shutoff valve and how do you close it?

The main water shutoff controls every fixture and appliance in the house. In warm climates, it's typically outside near the street, often in a concrete box labeled "water meter" or buried under a round plastic lid. In cold climates, look inside near where the supply line enters—basement wall, crawlspace, or utility closet. The valve is usually a gate valve (round wheel) or ball valve (lever handle).

To shut it off, turn a gate valve clockwise until it stops—it may take 10–20 full rotations. A ball valve requires a single quarter-turn (90 degrees) clockwise or until the handle is perpendicular to the pipe. If the valve is stuck, apply penetrating oil and wait five minutes, then try again. Never force a corroded valve with a pipe wrench—you risk snapping the stem and flooding the area.

Test the valve once a year by turning it off, opening a faucet upstairs to verify flow stops, then turning it back on slowly. If water still trickles after closing, the valve seat is worn and you'll need a plumber to rebuild or replace it. Mark the valve location with reflective tape or a laminated label so you can find it in the dark. In homes with basement water issues, a secondary shutoff near the water heater provides faster access for localized leaks.

Common mistake: closing the valve too fast. Water hammer—the shockwave from abrupt stoppage—can crack solder joints and rupture older pipes. Close gate valves over 30 seconds, not all at once.

How do you shut off the gas supply at the meter?

The gas meter shutoff is a rectangular or round valve on the inlet pipe where gas enters your meter. It sits between the street supply and the meter dials, usually at knee height on an exterior wall. When the valve's rectangular tab is parallel to the pipe, gas is flowing. A quarter-turn clockwise (so the tab is perpendicular) shuts it off.

You'll need an adjustable wrench or a dedicated gas shutoff wrench—keep one zip-tied to a nearby fence post or taped inside the meter box. Never use pliers; they can slip and damage the valve. Once you shut off gas, do not turn it back on yourself. Gas appliances have pilot lights and electronic igniters that must be relit in a specific sequence. Call your utility company or a licensed plumber to restore service and test for leaks.

Shut off gas immediately if you smell rotten eggs (mercaptan additive), hear hissing near the meter or appliances, or if an earthquake or excavation damage is suspected. If you're unsure whether to shut it off, evacuate and call 911—firefighters can make the call. Unlike water, a gas shutoff is a last resort; restoring service often incurs a $75–$150 utility fee plus the plumber's time.

In homes with older aluminum wiring, a gas leak combined with an electrical arc is a fire risk. Keep a battery-powered gas detector ($30–$60) near the water heater and furnace.

Where is the main electrical breaker and when should you flip it?

The main breaker is the largest switch at the top or bottom of your electrical panel, labeled "MAIN" or with an amperage rating (100A, 150A, 200A). Flipping it to OFF cuts power to every circuit in the house. The panel is usually in the garage, basement, utility room, or on an exterior wall.

Shut off the main breaker if water is flooding the panel, if you smell burning plastic inside the box, or if an electrical fire starts and you cannot isolate the faulty circuit. In flood scenarios, turn it off before water reaches the panel—standing water contacting live bus bars can electrify the entire puddle. During wildfires, some fire departments advise shutting off power to reduce ignition sources if embers enter vents or attics.

Do not shut off power unless absolutely necessary. Refrigerators, sump pumps, and medical equipment lose function, and resetting digital thermostats and appliance clocks is a hassle. If only one room has an issue, trip that individual breaker instead of the main. After an outage, inspect the panel for charring, melted insulation, or tripped AFCI/GFCI breakers—signs of a wiring fault that need an electrician.

Label each breaker with blue painter's tape and a Sharpie so you know which controls what. Test the main breaker annually by flipping it off and back on; if it feels loose or won't stay in the ON position, it's worn and must be replaced by an electrician. For homes with ceiling water stains, a leaky roof dripping into the attic junction box is a hidden shock hazard.

What tools and prep work should you do now?

Emergencies don't wait for you to find a wrench. Assemble a shutoff kit: 12-inch adjustable wrench, flashlight, work gloves, and a whistle (to signal for help if you're trapped). Store duplicates at each shutoff location—one wrench zip-tied near the gas meter, one in the basement near the water valve, one on a hook by the electrical panel.

Take photos of each shutoff in the closed and open position, print them, laminate the printout, and tape it next to the valve or panel. Include arrows and the date you last tested it. If you rent out the property, add these instructions to your tenant welcome packet. For seasonal properties, walk through all three shutoffs before locking up; a frozen pipe burst while you're away for three months can total a kitchen.

Teach everyone in the household where the shutoffs are. Run a drill: set a timer for 60 seconds and see if each person can shut off gas, water, and power before it beeps. Kids over 12 should know how to do it.

Replace any valve that leaks, sticks, or requires excessive force. A $150 ball valve replacement is cheap insurance compared to a $12,000 water-damage claim. If your gas meter is behind a locked gate or your main breaker is padlocked (common in some municipal codes), ensure you have 24/7 key access.

FAQ

What if my water shutoff valve is stuck or won't turn?

Apply penetrating oil (PB Blaster, Liquid Wrench) and wait 10 minutes. Tap the valve body gently with a rubber mallet to break corrosion, then try again with a wrench. If it still won't budge, call a plumber—forcing it can snap the stem and flood the area. In homes over 30 years old, rebuilding or replacing the valve is often necessary.

Can I turn the gas back on myself after shutting it off?

No. Once the gas meter valve is closed, pilot lights extinguish and air enters the lines. Turning it back on without purging the system and relighting pilots in the correct order risks gas buildup and explosion. Call your utility company or a licensed plumber to restore service—expect a $75–$150 service call.

Do I need to shut off power during a flood if the water hasn't reached the panel yet?

Yes, if the water is rising toward the panel or if any outlets are submerged. Electricity can travel through floodwater up to 25 feet. Shut off the main breaker while standing on a dry surface, wearing rubber-soled shoes. If the panel is already wet or you're standing in water, do not touch it—evacuate and call 911.

How do I know if my electrical panel is overloaded and needs to be shut off?

Signs include a burning smell near the panel, breakers that trip repeatedly, or the panel box feeling warm to the touch. If any breaker won't reset or the main breaker trips without obvious cause, shut off the main and call an electrician—these are fire precursors. Never tape a breaker in the ON position or replace a 15A breaker with a 20A to stop tripping.

Should I shut off water to the whole house if only one fixture is leaking?

Not usually. Most sinks, toilets, and appliances have local shutoff valves (small oval handles under the sink or behind the toilet). Close the local valve first. Shut off the main only if the leak is at a pipe junction inside a wall, if the local valve is broken, or if water is flooding faster than you can catch it. After isolating the leak, log the incident and valve locations in your maintenance tracker so the next person knows what to do.

This is educational information, not emergency-response advice. If you smell gas or see smoke, evacuate immediately and call 911. For life-threatening electrical hazards, do not attempt repairs—call your utility company or fire department.