What to Do in the First 24 Hours After Water Damage — A Step-by-Step Action Plan

Stop Reading and Do This Right Now

If you have active water entering the home from an internal source — a burst pipe, a failed appliance supply line, an overflowing fixture — locate your main water shut-off valve and turn it off before anything else.

The main shut-off is typically located at the water meter near the street, in a basement or utility room near where the main line enters the home, or in a mechanical room. Turn it clockwise (righty-tighty) to stop flow. In homes with individual fixture shut-offs, you may be able to isolate just the affected fixture — the valve is typically under sinks and behind toilets — but when in doubt, shut off the main.

If the source of water is external — rising floodwater, storm surge, surface flooding — there is no internal valve to shut off. Your priority shifts immediately to safety assessment and contacting emergency services and restoration professionals simultaneously. Then come back and read the rest of this guide.

Step 1: Ensure Electrical Safety Before Entering Flooded Areas (First 5 Minutes)

Water and electricity are lethal in combination. Before entering any flooded space, assess the electrical hazard. If standing water is present near your electrical panel or in a space with outlets, switches, or appliances at floor level, the risk of electrocution is real.

Locate your circuit breaker panel from a dry area — typically in a hallway, garage, or utility room — and switch off circuits for the affected areas. Flip the main breaker if you're uncertain which circuits serve the flooded space. If the panel itself is in a flooded area and you cannot safely access it from dry ground, do not attempt to reach it. Call your electric utility company — most will dispatch a crew to disconnect power at the meter on an emergency basis, typically within 30–60 minutes.

Do not use extension cords, power tools, or any electrical device in or near a wet area until an electrician has inspected and cleared it. Do not use a gas-powered generator indoors or in an attached garage — carbon monoxide is odorless and has killed hundreds of families in the hours after flooding events.

Step 2: Document Everything Before Touching Anything (First 15 Minutes)

Before you move a single piece of furniture or start removing water, take a complete video and photo record of all affected areas. This documentation is the foundation of your insurance claim. It establishes the pre-mitigation condition that your adjuster will need to verify your loss.

How to document effectively:

• Video first: Walk through all affected areas from doorways, capturing a continuous video showing the extent of water, the location of visible damage, and the condition of all affected rooms. Narrate what you're seeing — the date, time, the source of water if known, the approximate depth of standing water.
• Still photos: Follow up with close-up photos of each damaged item, each affected wall and ceiling section, each area of flooring showing water damage or staining. More photos are always better than fewer.
• Date and time stamps: Smartphone photos automatically embed date and time in the metadata — don't edit or filter the photos as this can strip metadata. Keep originals.
• The water source: Photograph the point of failure — the burst pipe, the failed appliance, the cracked foundation wall. This is critical for claim classification.

Do not clean anything, move anything major, or begin drying before this documentation is complete. Ten minutes of documentation upfront is worth ten times that in adjuster negotiation time later.

Step 3: Call Your Insurance Company (First 30 Minutes)

Call the claims line on your insurance card — not your local agent's office number, but the 24/7 emergency claims line. Open a claim and get a claim number on that first call. Have ready: the date and approximate time the loss occurred, the cause of water if known, the areas of the home affected, and confirmation that the source of water has been stopped.

Key questions to ask on that first call:

• Am I covered for this type of loss? (Establish coverage in principle before the adjuster visit)
• Do I need adjuster approval before beginning emergency mitigation? (Answer is almost always no — your policy's duty-to-mitigate provision and most insurers' emergency authorization protocols authorize immediate professional mitigation)
• Does your company have preferred emergency service contractors? (Some insurers have direct-bill relationships with restoration networks — faster, cleaner claim process)
• Am I covered for additional living expenses (ALE) if the home is uninhabitable? (Many policies cover hotel, meals, and storage while you're displaced)

Get the claim number, the adjuster's name when assigned, and the insurer's 24/7 contact number. Write it all down. This starts the paper trail your claim depends on.

Step 4: Call a Professional Restoration Company (Simultaneously)

Do not wait for adjuster approval before calling for professional emergency water extraction. The adjuster's inspection comes after mitigation begins — not before. Your policy's duty-to-mitigate clause requires you to take reasonable steps immediately. Waiting 24–48 hours for an adjuster to visit before starting extraction is not only not required, it can result in claim dispute for damage that developed during the wait.

Call a restoration company simultaneously with or immediately after your insurer. What to expect from the first call: an estimated arrival time (IICRC-certified companies in our network respond within 60–90 minutes), confirmation of Category classification based on your description of the water source, and information about what to do or not do before they arrive.

Professional water damage restoration crews arrive with truck-mounted extractors capable of removing hundreds of gallons per hour, LGR dehumidifiers for structural drying, industrial air movers, penetrating and non-penetrating moisture meters for full moisture mapping, and thermal imaging cameras to find hidden moisture behind walls and above ceilings. This equipment performs a fundamentally different job than household fans and a wet/dry vac.

Step 5: Remove People and Pets from Contaminated Areas

If the water source is Category 2 (grey water — dishwasher, washing machine overflow, toilet without solids) or Category 3 (black water — sewage backup, floodwater, storm drain backup), evacuate the affected areas immediately. Do not allow children, elderly individuals, pregnant women, or pets in flooded spaces until the restoration crew has assessed and cleared the area. Category 3 water contains pathogens including bacteria such as E. coli and salmonella, as well as potentially viruses and parasites.

Category 1 losses (clean water from supply lines) present limited biological hazard but do present slip and fall risk. Keep the flooded area cordoned off from foot traffic until water is removed. Wet hard floors — tile, hardwood, vinyl — become extremely slippery.

Step 6: Protect and Move Salvageable Contents (Hours 1–4)

Once you have documented everything and confirmed the area is electrically safe, begin protecting contents that are salvageable:

• Furniture off wet carpet: Place aluminum foil squares, plastic bags, or wooden blocks under furniture legs to elevate them off wet carpet. Dyes from wood furniture legs transfer to wet carpet quickly and permanently.
• Remove area rugs: Rugs trap moisture against hardwood floors and cause carpet dyes to bleed. Remove them from the wet zone and hang them to dry in a dry area.
• Prioritize irreplaceable items: Documents, photographs, passports, financial records, artwork, musical instruments — move these to dry areas first. Wet documents can sometimes be restored by freezing (stops further deterioration) if professional document restoration isn't immediately available.
• Electronics: Move electronics to dry areas. Do not power on wet electronics — wait until they have been assessed and dried. Water damage to electronics is often recoverable if the device is never powered on while wet.
• Leave heavy contaminated items: Heavy furniture or items that contacted Category 2 or 3 water should be left in place for the restoration crew. Moving contaminated items through clean areas can spread contamination.

What NOT to Do in the First 24 Hours

Knowing what to avoid is as important as knowing what to do:

• Do not use household fans as your primary drying strategy. Box fans and ceiling fans create airflow but cannot remove moisture from the air — they move humid air around the space. Without commercial dehumidification to lower the relative humidity, air movement alone does not dry structural materials. It can actually spread mold spores if mold is present.
• Do not run HVAC if Category 2 or 3 water is involved. Running forced-air HVAC when sewage or contaminated water is present spreads spores, bacteria, and contamination through every duct in your home. What starts as a contained basement problem becomes a whole-house contamination event. Wait for the restoration crew's assessment before running HVAC.
• Do not discard damaged materials before adjuster inspection. Even if wet drywall, flooring, or furniture appears unsalvageable, leave it in place until your insurer has documented the damage. Adjusters need to see the extent of damage to approve replacement costs. If physical evidence is gone, you're arguing from memory rather than documentation.
• Do not sign Assignment of Benefits documents at the door. AOB clauses transfer your insurance rights to the contractor. While many AOB relationships are legitimate, signing without understanding the terms can complicate your claim and your relationship with your insurer. Review any service agreement with your insurer or an attorney before signing.
• Do not attempt to dry concrete with household equipment. Concrete is an IICRC S500 Class 4 drying material — it releases moisture very slowly and requires commercial LGR dehumidifiers deployed at specific intervals to create the vapor pressure differential needed for drying. Household equipment won't move the needle on concrete drying.

Hours 4–24: The Professional Drying Phase Begins

Once the restoration crew arrives and completes the initial assessment and moisture mapping, the active drying phase begins. Here's what this looks like:

Extraction: Truck-mounted extractors remove standing water and residual moisture from carpet and other flooring materials. The extraction phase typically takes 1–3 hours depending on water volume and affected area. More water removed during extraction means faster drying times and lower overall equipment costs.

Moisture mapping baseline: The crew establishes baseline moisture readings throughout the affected area — including adjacent walls, ceilings, and subfloor spaces — using penetrating moisture meters and thermal imaging. These baseline readings are the starting point for your drying log and your insurance documentation.

Equipment deployment: Commercial LGR (Low Grain Refrigerant) dehumidifiers are positioned based on the S500 psychrometric calculation for the cubic footage and moisture load being dried. Industrial air movers are positioned at a rate of approximately one per 50–100 square feet of affected area. Air scrubbers with HEPA filtration are deployed in Category 2 and 3 losses and whenever mold is suspected.

Equipment runs continuously. This is important: do not turn off the dehumidifiers or air movers at night or when you leave the home. The drying process is continuous. Interrupting equipment operation extends the drying timeline and increases total equipment cost. If equipment noise is a problem overnight, confirm with the crew which units are essential vs. supplemental.

The drying phase typically runs 3–7 days for Category 1 residential losses in above-grade spaces with wood and drywall construction. Concrete drying takes longer — 7–14 days is typical for concrete floors under commercial drying conditions. Daily moisture monitoring visits confirm the drying trajectory and adjust equipment as needed. Learn more about how long restoration takes by damage type.

The Documentation You Need to Keep

Throughout the restoration process, maintain a personal log of everything related to the loss. This documentation supports your insurance claim, any ALE (Additional Living Expense) reimbursement you're entitled to, and any future disclosure requirements if you sell the home.

Keep records of:

• Every day you are displaced from the home and where you stayed (hotel receipts, short-term rental invoices)
• Every meal expense incurred because your kitchen is unavailable
• Every contractor invoice, for any work related to the water damage event
• Every phone call with your insurer — date, time, name of the person you spoke with, what was discussed and agreed
• Every purchase made because of the water damage — cleaning supplies, replacement clothing, storage unit rental
• All psychrometric logs produced by the restoration crew (moisture readings, equipment logs, temperature and humidity readings) — these are your technical proof of drying completion

The difference between a well-documented claim and a poorly documented one can be tens of thousands of dollars. The insurer's obligation is to restore you to the pre-loss condition — but their willingness to pay depends on evidence. If you're concerned about mold developing during the drying period, discuss monitoring protocols with your restoration contractor on day one.