The first 24 hours after a water damage event are the most consequential. The decisions and actions you take, or don’t take, in this window determine whether you face a manageable restoration project or a prolonged, expensive ordeal involving mold, structural damage, and insurance disputes. Here is the sequence, step by step.
Hour 0: The Moment You Discover It
Stop the Source
The first action is the most obvious and the most important: stop the water. Find the shutoff valve for the affected fixture (toilet, sink, dishwasher, washing machine) or shut the main water supply to the house. The main shutoff is typically near the water meter, in a basement utility area, or where the supply line enters from the street. Know where your main shutoff is before you ever need it.
For roof leaks during an active storm, where you can’t address the source, do what you can to contain the intrusion: buckets under active drips, plastic sheeting over furniture and electronics. The source will be addressed when the storm passes; your job right now is to minimize damage to contents.
For sewage backup: don’t attempt to address the source yourself. Call a licensed plumber for the sewer issue and a restoration company for the contamination simultaneously. Don’t enter the sewage-affected area without rubber boots and gloves at minimum.
Assess the Category
Before doing anything else in the affected area, assess what kind of water you are dealing with:
- Category 1 (clean water): Supply line failure, clean toilet overflow, appliance supply line. No significant contamination risk. Wear normal household protective clothing.
- Category 2 (gray water): Washing machine overflow, dishwasher overflow, toilet overflow with urine. Contamination risk, wear rubber gloves and avoid contact with eyes and mouth. Wash hands thoroughly after contact.
- Category 3 (black water): Sewage backup, flood water from outside, any water with visible contamination. Don’t enter without rubber boots, rubber gloves, N95 mask minimum. Treat all contacted surfaces and materials as biohazardous.
Protect Yourself From Electrical Hazard
Before entering any flooded area, regardless of water category, verify that electricity to the area is off. If the circuit breaker for the affected area is in the affected area, cut power at the main panel from outside the flooded space. Don’t operate any switches or outlets in a flooded room. Don’t enter standing water in any area where electrical equipment has been submerged until power is confirmed off and a licensed electrician has cleared the electrical system.
Hour 0–1: Document Everything
Photograph and Video Before Touching Anything
Before any water is moved, any item is relocated, or any cleanup begins, document. Walk through the entire affected area with your phone on video. Narrate what you see: the water source, the spread, the affected materials. Then photograph systematically: every affected wall from multiple angles, every piece of affected flooring, every damaged appliance and piece of furniture, every visible water line on walls. Record water line heights. Open cabinets, closets, and storage areas and document what is inside.
This documentation is your insurance claim. It is the evidence that establishes what was damaged, to what extent, and from what cause. Anything not documented before cleanup is substantially harder to claim. Don’t skip this step even when the urge to start cleaning immediately is overwhelming.
Document the Cause
If the source is a failed appliance, plumbing fixture, or supply line, photograph it. If it is a roof leak, photograph the interior damage location and the exterior roof condition as soon as it is safe to do so. If it is flooding from outside, photograph the exterior conditions, standing water in the yard, street flooding, saturated ground, and note the date, time, and weather conditions. Check your phone’s weather app for the day’s precipitation data and note it.
Pull Your Insurance Policy
Locate your homeowners insurance policy declarations page. You need: your policy number, your insurer’s 24/7 claims line number, and your deductible amount. If you carry a separate flood insurance policy (NFIP or private), locate that as well. If you have a sewer backup endorsement, note the coverage limit.
Hour 1–4: Make the Critical Calls
Call Your Insurance Company
File your claim as soon as you have completed documentation. Most major carriers have 24/7 claims lines. Filing promptly starts the adjuster assignment process and protects your claim under the “timely notice” requirement most policies contain. When you call, have ready:
- Policy number
- Date and time the event occurred or was discovered
- Brief description of what happened and the cause
- Your current contact information and, if displaced, temporary housing address
- Whether emergency mitigation work has started or is about to start
Inform the adjuster that emergency mitigation is proceeding to prevent further damage. This is appropriate and expected, your policy requires it. The adjuster doesn’t need to be present for extraction to begin. Get a claim number before you hang up.
Call a Restoration Company
For any event involving more than a small, contained hard-surface spill, call a professional restoration company. For emergencies, active flooding, sewage backup, Category 2 or 3 events, call immediately. For significant clean-water events, call as soon as documentation is complete. Target response within 2 hours for emergencies; the same day for serious but non-emergency events.
When you call, tell them: the event type, approximate volume, whether the source is stopped, the water category if you know it, and whether there are any safety concerns (electrical, structural). Ask for an estimated arrival time and whether they are available 24/7 for emergencies.
Notify Your Mortgage Lender (If Applicable)
Your lender is a loss payee on your homeowners policy. This means insurance checks for structural repairs will be made out to both you and the lender. Notify your lender early so they can set up the endorsement process, some lenders are faster than others, and early notification prevents the lender from becoming a bottleneck in your restoration funding timeline.
Hour 1–6: While Waiting for the Restoration Crew
Protect Undamaged Contents
Move furniture, electronics, rugs, and personal items out of the affected area to prevent additional damage. Move items off wet flooring, furniture legs sitting in water absorb moisture and stain flooring. Move electronics away from water and off the floor. Move papers, books, and other sensitive items to dry areas. Don’t turn on electronic devices that may have been exposed to water until they have been fully dried and inspected.
Remove Excess Water Manually
For standing water in accessible areas, using a wet/dry shop vac, towels, or a mop, begin removing water from hard surfaces. This isn’t a substitute for professional extraction but it limits ongoing absorption while you wait for professional equipment. Don’t use a household vacuum cleaner for water extraction, use only a wet/dry vac rated for water.
Ventilate: Carefully
Open windows and interior doors to begin air circulation if outdoor conditions are favorable. Favorable means: outdoor humidity is lower than indoor humidity (during the day in PA summers, not overnight), and outdoor temperatures are reasonable. Don’t open windows if it is raining, if outdoor temperatures are extremely high, or if outdoor humidity is higher than indoor. Running exhaust fans in bathrooms and kitchens helps. Don’t run HVAC if water may have entered ductwork or air handler components, this can spread contamination throughout the home.
Begin the Home Inventory
While waiting for the restoration crew, sit down and begin writing your contents loss inventory. Go room by room from memory. Note every item that was damaged or destroyed, furniture, electronics, clothing, personal items, appliances, tools, sporting equipment, anything of value. Note approximate age and replacement cost. This list will form the basis of your personal property (Coverage C) claim and is most accurate when written immediately after the event while the contents of each room are fresh in your memory.
Hour 4–24: Professional Assessment and Mitigation
What to Expect From the Restoration Crew
A professional restoration crew arriving for emergency response will:
- Conduct a moisture assessment using meters and thermal imaging to map the full extent of water intrusion
- Extract standing water using truck-mounted or portable extraction equipment
- Deploy commercial dehumidifiers and air movers throughout the affected area
- Assess Category classification and, for Category 2/3 events, discuss demolition of contaminated porous materials
- Document everything with their own photos and moisture readings, this documentation is part of your insurance claim package
- Leave a drying monitoring schedule, daily visits to check moisture readings
What You Should Confirm Before They Leave
- Get a written scope of work, even a preliminary one, before authorizing work beyond emergency extraction
- Confirm the company is licensed and insured (ask for a certificate of insurance)
- Confirm they work with your insurance carrier and can produce Xactimate-format estimates
- Understand the payment arrangement, many legitimate companies work directly with insurance rather than requiring significant upfront payment
- Get a contact name and direct phone number for your project manager, not just the dispatch line
Arrange Temporary Housing If Needed
If your home is uninhabitable, sewage backup, significant flooding, or any event that has made living conditions unsafe, arrange temporary housing. Your homeowners policy’s Additional Living Expense (ALE) coverage pays for hotel or rental housing and incremental living costs while your home is being restored. Call your insurer to confirm ALE coverage is activated and ask about advance payment, many carriers will release initial ALE funds quickly to get you housed immediately.
Frequently Asked Questions
Do I need to wait for my adjuster before starting mitigation?
No. Emergency mitigation, water extraction, initial drying equipment deployment, should begin immediately without waiting for adjuster inspection. Your policy requires mitigation, and the adjuster expects you to begin immediately. Document the pre-mitigation condition thoroughly and notify the adjuster that work is proceeding. They will schedule their inspection around the active work.
Should I throw away damaged items right away?
Photograph everything before discarding. For Category 3 contaminated porous materials, sewage-soaked carpet, drywall, document and discard with adjuster awareness. For furniture, appliances, and personal property, photograph and list before discarding, and check with your adjuster about their documentation requirements. Throwing away items without documentation forfeits your ability to claim them.
Can I use bleach to clean up water damage?
Bleach is appropriate for sanitizing hard, non-porous surfaces after a Category 2 or 3 water event, tile, concrete, sealed flooring. It isn’t appropriate for porous materials, drywall, wood, insulation, carpet, because it doesn’t penetrate to kill mold and bacteria within the material, and it can accelerate surface deterioration. EPA-registered professional antimicrobial products are the appropriate treatment for porous structural surfaces.
What if I can’t reach my insurance company in the middle of the night?
All major carriers have 24/7 claims lines, they may have longer hold times at night, but they are staffed. Document the date and time of your call attempt if you can’t get through, and keep trying. For emergency mitigation, don’t wait for insurance to begin, document thoroughly and proceed with emergency response. The claim can be filed once you connect with the carrier.
My landlord is responsible for the building: what are my responsibilities as a renter?
As a renter, your responsibilities are: notify your landlord immediately, protect your personal property from further damage, and file a claim under your renters insurance policy for your personal property. The building owner is responsible for the structure. However, you should still document the event thoroughly, for your personal property claim and in case of any dispute about the cause or timeline of the event. Don’t wait for your landlord to take action before protecting your own belongings.