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What Should I Do in the First 30 Minutes After a Water Leak?

Last updated October 25, 2026

The short answer

Stop the Water and Ensure Safety

Your first and most critical priority is to shut off the leak's source. For a burst pipe, find your home's main water shutoff valve, which is often located where the main water line enters the house, in a basement, or near the water heater. A leaking appliance, like a washing machine or dishwasher, requires turning off its specific water supply line, usually found behind the unit. If water contacts any outlets, lights, or appliances, cut power at your breaker box. This prevents dangerous electrical shock. Do not walk through standing water if you suspect any electrical risk.

Document the Damage for Your Records

Use your phone to take clear photos and videos of the affected area. Capture the water source, any standing water, and all damaged belongings, from baseboards to furniture and personal items. This documentation is crucial for your insurance claim. Policies vary, and your insurer decides what is covered. Thorough evidence helps support your case during the claims process. Make sure to take pictures from multiple angles and include any visible water lines on walls. Keep these files safe and organized.

Start Water Removal and Air Movement

Begin soaking up water with towels, mops, or a wet-dry vacuum. Lift wet rugs and move furniture to a dry area. Open windows and doors if outdoor air is dry, and use fans to circulate air. This initial drying effort slows the spread of water and helps reduce the chance of mold taking hold quickly. Be thorough in corners and under furniture where water can pool unnoticed. This step buys time before the pros can start their detailed drying process.

  • Use towels, mops, or a wet-dry vacuum on standing water.
  • Lift and drape rugs over a clothesline or railing outside.
  • Place wood blocks or aluminum foil under furniture legs.
  • Open windows and doors to improve ventilation.
  • Set up fans to blow air across damp surfaces.
  • Wring out soaked towels in a sink or bathtub.

Identify the Source and Call for Help

Determine if the leak is from a roof, pipe, appliance, or your home's foundation slab. This information helps you describe the problem accurately to the pros. Contact local water damage pros who can properly assess and begin the drying process. While waiting, you can call a plumber for a pipe leak or a roofer for a storm-related issue to stop the flow. Knowing the source helps the pros plan their equipment setup and drying strategy, ensuring they bring the right tools for the job.

Protect Your Belongings and Health

Remove electronics, books, and important documents from the wet area. Wipe down items that got splashed. Avoid contact with water that may be contaminated from a sewage backup or outdoor flooding. Wear rubber gloves and boots if you must wade through it. See a doctor if you feel unwell after exposure to dirty water. For porous items like upholstered furniture, lifting them off wet carpet can prevent secondary damage. Move valuables to a completely dry, safe location to protect them from humidity.

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Frequently asked questions

Should I call my insurance company immediately?

Yes, you should notify your insurer promptly to start the claims process. Have your policy number ready and share the photos you took. Remember, policies vary, and your insurer decides what is covered. Do not begin permanent repairs until an adjuster has visited.

What if I cannot stop the leak at the source?

If you cannot find or operate the shutoff valve, call an emergency plumber. Meanwhile, use buckets or containers to catch dripping water and minimize damage. Move items out of the water's path and continue documenting the situation while you wait for help.

Why is fast action so important for water damage?

Water spreads quickly, soaking into drywall, flooring, and subfloors. Within hours, it can cause swelling and warping. Mold can begin to grow in as little as 24 to 48 hours in a humid environment. Quick removal limits the damage area and drying time.

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