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What Should I Do First After a Flood in My House?

Last updated October 31, 2026

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The short answer

Safety First

Your top priority is protecting yourself and your family. If the floodwater is still rising or you see any signs of electrical hazards, do not enter the water. Turn off the main power breaker only if you can do so without standing in water. If you smell gas or hear hissing, leave immediately and contact the gas company from a safe distance.

Wear rubber boots and gloves if you must walk through water, as floodwater can contain contaminants. Keep children and pets away from the affected areas. If you feel unwell after exposure, see a doctor. Acting quickly matters, but safety comes before cleanup.

Stop the Water Source

Once you are safe, find the main water shutoff valve for your home. Turning it off stops clean water from adding to the flood. If the flood came from heavy rain or a rising river, you may not have a shutoff that helps, but closing the valve prevents further damage from your own plumbing.

If the water is from a burst pipe, shutting off the valve can limit the damage to one area. If you cannot find the valve or it is stuck, call a plumber. Knowing the location of your shutoff valve before an emergency is wise, especially in regions with cold winters that can freeze pipes.

  • Turn off electricity first if safe
  • Shut off the water main
  • Wear protective gear
  • Avoid standing water with electronics
  • Document damage with photos
  • Move valuables to higher ground

Document the Damage

Before you start moving things, take clear photos or videos of every affected area. Capture the water level, damaged belongings, and any structural issues. This documentation helps with your insurance claim. Policies vary, and your insurer decides what is covered, so keep records of everything you remove.

Make a written list of damaged items, including their approximate age and value. Do not throw anything away until you have recorded it, as your insurance company may want to see the damage. If you have receipts or serial numbers, note them down. This step is tedious but important for a smoother claim process.

Start Removing Water

Begin extracting standing water as soon as you can. Use a pump, wet vacuum, or even buckets if the water is shallow. The faster you remove the water, the less time it has to soak into walls, floors, and furniture. If you have a basement, water may collect there, so check it carefully.

For large amounts of water, you may need equipment like submersible pumps. Local water damage pros have the tools to handle big jobs, but you can start with what you have. Always have a helper nearby when working near water, and never run electrical equipment in wet conditions. If you cannot safely do it yourself, call for help.

Dry Out and Prevent Mold

After removing the bulk of the water, focus on drying the structure. Open windows if the outdoor air is drier than indoors, and use fans or dehumidifiers to circulate air. Remove wet carpets, rugs, and upholstered furniture, as they hold moisture and promote mold growth. In humid climates, mold can start within 24 to 48 hours.

If the flooding was severe, you may need professional structural drying and dehumidification to fully dry walls and subfloors. Do not attempt to remove drywall or insulation yourself unless you know it is safe. Mold can be a health hazard, so if you see or smell mold, consider consulting a mold professional. Acting quickly reduces the chance of long-term damage.

  • Use fans and dehumidifiers
  • Remove wet carpets and rugs
  • Open windows for airflow
  • Discard soaked upholstery
  • Check for mold in hidden areas
  • Consider professional drying services

Water damage does not wait

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Frequently asked questions

How long does it take for mold to grow after a flood?

Mold can begin to grow within 24 to 48 hours in warm, damp conditions. In humid climates, the risk is higher. That is why drying out your home quickly is important. If you see mold, wear a mask and gloves, and consider contacting a mold professional for safe removal.

Should I turn off the electricity if the water is deep?

Only turn off the electricity if you can reach the breaker without standing in water. If you must wade through water, do not attempt it. Instead, call an electrician or your utility provider to shut off power from outside. Safety is more important than the risk of further damage.

Can I clean up floodwater myself?

You can start removing small amounts of water and drying items, but large floods or contaminated water may require professional help. If the floodwater came from sewage or chemicals, avoid contact and call local water damage pros. They have the right equipment to handle hazardous situations safely.

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