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Water Damage: First 48 Hours Checklist

Do safety first (gas, power, generators), then photograph and call your insurer, make only temporary repairs, and get wet materials dry within 24-48 hours. The list keeps your ticks in this browser and prints.

By Paul Gunder

Updated November 8, 2026

9 public sources, listed belowHow we check

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How the list is ordered

The order matters more than the individual items. The first section is about not getting hurt, because the worst outcomes after water gets into a house are electrical shock, gas, and carbon monoxide from a generator run in the wrong place. Only after that does the list turn to evidence for your insurer, then to stopping the damage from spreading, and last to drying.

Evidence comes before cleanup because insurers settle on what can be shown. The National Association of Insurance Commissioners tells people to document every loss before removing debris or belongings, and the North Dakota and Texas insurance departments both say to keep repair records. If you throw out a soaked rug before photographing it, you have given up your best proof that it existed and was ruined.

The drying section follows the Environmental Protection Agency. Its brief guide to mold says to dry wet areas and items within 24-48 hours, and its flood cleanup page says mold can grow on wood, drywall, carpet and furniture that stay wet for more than 24 hours. A federal guide for homeowners written after Hurricane Sandy gives a practical test: if you could not dry the house and its contents inside that window, assume mold is present.

Temporary repairs only

Some items ask you to make temporary repairs and to hold off on permanent ones. That is not caution for its own sake. The Texas Department of Insurance warns that permanent repairs made before the insurer inspects can lead to a denial, and California's insurance department says a policy may not cover further damage if you did not take reasonable steps to protect the property. A tarp over a roof opening and plywood over a broken window satisfy both rules. A new roof does not, yet.

Keep every receipt. Costs for temporary repairs, equipment, and a place to stay are things insurers commonly reimburse on a covered loss, and you can only claim what you can show you spent.

Worked example: a supply line fails while you are out

Imagine you come home to a wet kitchen floor and water still running from under the sink. You do not know yet whether the cabinet or the wall is soaked. Start with the first section: no gas smell, and you are not standing in water near an outlet, so it is safe to go in. Shut off the water at the source, then work down the list. Photograph the cabinet, the floor and the wall before moving anything. Call your insurer and describe what happened in plain words. Put a note in your call log. Open the cabinet doors and take out the drawers so the hidden spaces can dry, and clean any visible mold before you bring in a fan.

By the end of that first evening you have a record, a call logged with the insurer, and the drying under way. That is the point of the list: not to do everything at once, but to do the right thing next.

When to stop and call someone

Some items are marked urgent, and they are not do-it-yourself jobs. If the water may include sewage, EPA says to call a professional experienced with contaminated water damage. If mold covers more than about 10 square feet, or the water damage is substantial, its guidance is to consult a professional experienced in mold cleanup. If the heating and cooling system was reached by floodwater, have it cleaned by a professional before you run it.

What this list does not do

It does not tell you whether the loss is covered; use Is my damage covered? for that. It does not price the repair. Public sources for repair costs are hard to come by, which is why this site does not publish cost estimates it cannot trace to a saved page. Once this first stretch is over, the claim documentation checklist picks up where this one stops.

Water Damage: First 48 Hours Checklist