Keep People Away From the Water
Do not step into standing water near the water heater until you know the electrical and gas hazards are controlled. Water may have reached outlets, extension cords, nearby appliances, or the heater's electrical connection. The released water may also be hot enough to cause burns.
Move children and pets away from the affected area. If water is flowing through a ceiling, near an electrical panel, or around exposed wiring, leave the area and call emergency help rather than attempting the shutoff yourself.
Never touch a wet water heater, electrical disconnect, breaker panel, or gas control while standing in water.
Shut Off the Water Supply
If water continues flowing after the valve is closed, the valve may have failed or the tank may still be draining. Confirm that the home's main supply is off and call a plumber.
- 1Find the cold-water supply line entering the top of the water heater.
- 2Turn its shutoff valve clockwise until fully closed. A lever-style valve is closed when the handle is perpendicular to the pipe.
- 3If the local valve is stuck, broken, or unreachable, shut off the home's main water supply immediately.
- 4Open a hot-water faucet at a sink to relieve pressure in the system, but stay clear of hot discharge.
Turn Off the Energy Source Safely
For an electric water heater, switch off the dedicated water-heater breaker only if the electrical panel and the path to it are completely dry. Do not touch the panel if water has reached it.
For a gas water heater, turn the gas control to OFF only if you can reach it without entering water and you do not smell gas. If you smell rotten eggs, hear hissing, or suspect a damaged gas line, leave the home without operating switches or using a phone inside. Call 911 and the gas utility from a safe location.
Stop the Water From Spreading
Once the source and utilities are controlled, move undamaged belongings out of the water's path. Use towels only for very small amounts of clean water. A failed full-size tank can release 40 to 80 gallons, and supply-line failures can release much more before the shutoff is closed.
Do not use a household vacuum to remove water. It creates a serious shock hazard and cannot extract moisture trapped beneath flooring, behind baseboards, or inside wall cavities.
- Lift curtains, rugs, boxes, and furniture away from wet floors.
- Place foil or plastic beneath furniture legs if an item cannot be moved.
- Avoid pulling up flooring or cutting drywall until the damage is documented.
- Do not run the HVAC system if water may have entered ducts or nearby mechanical equipment.
Photograph the Damage Before Cleanup
Take wide photos and video showing the water heater, the apparent failure point, standing water, and every affected room. Capture close-ups of the tank label, model and serial number, supply connections, flooring, baseboards, walls, and damaged belongings.
Write down when you discovered the leak, when the water was shut off, and who you called. Keep the failed water heater and damaged parts until the insurance company or plumber confirms they are no longer needed as evidence.
Call a Plumber and a Water Damage Restoration Company
A licensed plumber should diagnose the failure, isolate or replace the heater, and verify that the plumbing and energy connections are safe. A water damage restoration company handles extraction, moisture mapping, structural drying, sanitizing when needed, and documentation of affected materials.
These are separate jobs. Replacing the water heater does not dry water that has traveled beneath tile, laminate, hardwood, cabinets, drywall, or insulation. Professional moisture readings are especially important when the heater is in an attic, utility closet, garage platform, or second-floor space.
Contact Your Insurance Company
Homeowners insurance often covers sudden and accidental water damage from a failed water heater, including damage to surrounding building materials and belongings. Coverage for the water heater itself depends on why it failed and the terms of the policy. Age, corrosion, wear, and poor maintenance may not be covered.
Report the loss promptly, ask whether emergency mitigation is authorized, and save every invoice. Do not delay necessary water removal while waiting for an adjuster if doing so would allow the damage to worsen. Your policy may require reasonable steps to protect the property from additional damage.
Ask your insurer to explain your specific coverage and deductible in writing. General guidance cannot determine what an individual policy covers.
Why Fast Drying Matters in Houston
Houston's high outdoor humidity slows natural evaporation. A room may look dry while moisture remains in drywall, wood framing, subfloors, cabinets, and insulation. Closing the door and running a household fan rarely creates the controlled low-humidity environment needed for reliable structural drying.
Professional drying typically combines extraction, air movement, dehumidification, and daily moisture readings. Fast action can reduce demolition, limit swelling and delamination, and lower the chance of microbial growth developing in concealed spaces.
Burst Water Heater Emergency Checklist
- 1Keep everyone away from standing or hot water.
- 2Shut off the heater's cold-water supply or the home's main water valve.
- 3Turn off electricity or gas only when it is safe to do so.
- 4Call 911 and the gas utility if you smell gas.
- 5Move undamaged belongings out of the water's path.
- 6Photograph the source and all visible damage.
- 7Call a licensed plumber and a water damage restoration company.
- 8Open an insurance claim and keep receipts, photos, and a written timeline.
- 9Do not restore power or install a replacement heater until professionals confirm the area is safe.
Houston Water Damage Restoration serves the greater Houston metro 24/7. If you have a water damage emergency, call us immediately — the faster extraction and drying begin, the less damage your home will sustain.