What Is the First Thing to Do After Discovering a Major Water Leak?

Immediately locate and turn your home's main water shutoff valve. This stops the flow and prevents more water from entering your property. If the leak is from a specific appliance like a dishwasher or toilet, you can use its local shutoff valve instead. Knowing where these valves are before a leak happens saves critical time during an emergency.

For major leaks, the main valve is your best bet. It's often found where the water line enters your house, in the garage, utility room, or near the water heater. Knowing your shutoff valve location saves critical time. A quick shutoff limits the volume of water that causes damage, making the cleanup process more manageable.

Once the water is off and the area is safe, start moving undamaged items away from the water. Lift furniture onto blocks or aluminum foil and relocate valuables to a dry room. Prompt action can save items from secondary damage like staining or swelling. The goal is to create a barrier between your belongings and the moisture.

Grab your phone or camera and take clear photos and videos of the leak source, the standing water, and all affected areas and items. This visual documentation is crucial for your own records and for communicating with your insurance company. Policies vary, and your insurer decides what is covered. Detailed notes on what happened and when can support your account of the event.

• Photograph the leak source, like a burst pipe or faulty appliance.
• Take wide shots showing the full extent of the flooded area.
• Capture close-ups of water-damaged furniture, flooring, and personal items.
• Record serial numbers and labels on damaged electronics or major appliances.
• Note the date and time on your photos or in a written log.
• Keep receipts for any emergency supplies or services you purchase.

While waiting for the pros, you can take steps to mitigate damage. If it's safe, use towels, a mop, or a wet-dry vacuum to remove standing water. Increase ventilation by opening windows and using fans, but only if the outdoor air is dry. Place aluminum foil under furniture legs to prevent carpet staining. These efforts can slow the spread of water.

Do not attempt major repairs on plumbing or electrical systems yourself. Avoid using standard household vacuums to suck up water, as this is dangerous. Resist the urge to tear out wet drywall or flooring prematurely, as this can complicate the insurance assessment. Your role is to stabilize the situation until local water damage pros can begin the restoration work.