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How Do I Clean up After a Flash Flood?

Last updated October 31, 2026

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The short answer

Safety First

Before you touch anything, turn off the electricity at the main breaker if the water reached any outlets or appliances. Also shut off the main water valve to stop further flooding. If the water level is above your ankles or you smell gas, do not enter. Call your utility company from a safe spot.

Wear rubber boots, gloves, and a mask. Floodwater often contains sewage, chemicals, and debris. Open windows and doors to let fresh air move through. If you feel unwell, see a doctor. Keep children and pets away from the flooded area until cleaning is done.

  • Turn off power and water before entering
  • Wear boots, gloves, and a mask
  • Open windows for ventilation
  • Keep kids and pets out
  • Do not enter if water is above ankles
  • Call utilities if you smell gas

Remove Standing Water

Get the water out as quickly as you can. Use a pump for deep water or a wet/dry vacuum for shallow puddles. For large areas, a submersible pump works well. You can also use buckets and mops for the last bit. The longer water sits, the more damage it does to walls, floors, and belongings.

After you remove the bulk of the water, use towels and sponges to soak up the rest. Wring them out outside. Check hidden spots like under cabinets and behind baseboards. If you have a basement, watch for water seeping through the walls. You may need a dehumidifier to pull moisture from the air.

Dry Out Your Home

Drying is not optional. Use fans to blow air across wet surfaces, and open windows if the outside air is drier. Dehumidifiers help pull moisture from the air, especially in closed spaces. Run them continuously and empty the water tray often. The goal is to get the humidity down to a level that discourages mold.

Remove wet carpets, rugs, and padding right away. They hold water and breed mold. Take out soaked drywall up to the water line, because it wicks moisture upward. Pull baseboards and trim to let walls breathe. If you have insulation that got wet, remove and discard it. Keep air moving behind furniture and in closets.

Clean and Disinfect

Once surfaces are dry, clean them with soap and water to remove dirt and grime. Then disinfect with a bleach solution or a commercial disinfectant. Mix one cup of bleach per gallon of water for hard surfaces. Wear gloves and a mask when using bleach. Do not mix bleach with ammonia or other cleaners.

Clean everything that touched floodwater, including walls, floors, and hard furniture. Wash clothing and bedding in hot water. Disinfect items like toys and utensils with a bleach solution, then rinse. If you have a well, have the water tested before drinking. For safety, assume everything that got wet is contaminated.

  • Use soap and water for cleaning
  • Disinfect with bleach solution
  • Wash clothing in hot water
  • Test well water before use
  • Discard porous items like mattresses
  • Rinse toys and utensils after disinfecting

Handle Belongings

Some things you can save, some you cannot. Hard, non-porous items like glass, metal, and plastic can be cleaned and disinfected. Porous items like mattresses, pillows, and upholstered furniture soak up floodwater and are hard to dry completely. It is often safer to throw them away.

Books and important papers may be salvageable if you dry them slowly. Place them in a freezer to stop mold growth, then thaw and dry. Photographs can be rinsed in clean water and dried face up. For valuable items, consider asking a professional about restoration. If you live in Columbus, keep your shutoff valve location written down for future floods.

Water damage does not wait

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Frequently asked questions

How long does it take to dry out a flooded home?

It can take days to weeks, depending on the materials and humidity. Use fans and dehumidifiers to speed it up. Do not rush reopening walls or floors, as hidden moisture leads to mold. Test with a moisture meter if you have one.

Can I clean floodwater myself?

You can handle small areas with basic supplies. For large floods or sewage contamination, consider hiring the pros. They have industrial equipment and training. If you have health concerns or the water is deep, leave it to professionals.

What should I throw away?

Throw away anything porous that absorbed floodwater, like mattresses, pillows, carpets, drywall, and insulation. Also discard food, medicine, and cosmetics that touched floodwater. When in doubt, throw it out. Your health is more important than saving items.

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