Water Damage: What to Do in the First 24 Hours
A step-by-step emergency checklist for the first 24 hours after a flood, burst pipe, or leak. What to do, what not to touch, and when to call the pros.
The first 24 hours after water gets into your home decide almost everything: whether you are looking at a few days of drying or weeks of demolition, whether your insurance claim goes smoothly, and whether mold gets a head start. Here is the order of operations, based on standard industry guidance.
Step 1: Make sure it's safe to be there
Water and electricity together are the real danger, not the water itself.
- If water is anywhere near outlets, appliances, or your electrical panel, do not walk through it. Shut off power at the breaker only if you can reach the panel without standing in water. If you can't, call an electrician or your utility.
- If you smell gas, leave the house and call your gas utility or 911 from outside.
- If the water is from sewage backup, treat it as contaminated. Keep children and pets away and do not handle it without protection.
Step 2: Stop the water at its source
For burst pipes, supply line failures, or appliance leaks, close the main water shut-off valve. In most NY homes it is in the basement or crawl space where the water line enters, often near the water meter. Every adult in the house should know where this valve is before an emergency. If the water is coming from outside (storm flooding, groundwater), you cannot shut it off, so move straight to protecting people and property.
Step 3: Document before you clean
Insurance adjusters want to see what happened, not what it looked like after you tidied up.
- Take photos and video of standing water, the source if you can find it, and every damaged room, floor, wall, and belonging.
- Do not throw anything away yet, even ruined items. Adjusters may want to see them.
- Note the time you discovered the damage and the time you shut the water off.
Step 4: Call a 24/7 restoration company
Professional water mitigation is one of the few home services where speed genuinely changes the outcome. Commercial extractors, air movers, and dehumidifiers remove water far faster than any shop vac and fans, and drying inside walls requires moisture meters you don't own. Most reputable companies in the NY metro answer around the clock and can arrive within one to two hours.
When you call, ask three things: Are you available now? Are you licensed and insured (and do you hold a NY Mold Remediation License if mold work is needed)? Do you bill my insurance directly?
Step 5: Call your insurance company
Report the claim the same day. Ask two questions: Is this type of loss covered, and what do you need from me? Most policies cover sudden and accidental water damage (like a burst pipe) but require you to take reasonable steps to prevent further damage. Hiring a mitigation company usually counts as exactly that. Keep every receipt.
Step 6: What you can safely do while you wait
- Move dry, undamaged belongings out of the wet area.
- Lift curtains and furniture skirts away from wet floors; put foil or blocks under furniture legs.
- Remove rugs from wet floors (wet carpet padding is usually a loss, but the pros will assess).
- Open windows if outdoor air is dry; skip this on humid days.
- Do not use your household vacuum on water, and do not run ceiling fixtures if the ceiling above is wet.
Why 24 to 48 hours matters so much
Mold can begin growing on damp materials within 24 to 48 hours, which is the EPA's standard guidance. Drywall, carpet padding, and insulation that stay wet past that window often have to be cut out rather than dried. Fast drying is the difference between a mitigation bill and a reconstruction bill.
FAQ
How fast does mold grow after water damage?
Mold can start growing within 24 to 48 hours on wet drywall, wood, carpet, and insulation. That is why professional drying should begin the same day the damage happens, not after the weekend.
Should I call insurance or a restoration company first?
Address safety and stop the water first, then call a restoration company, then your insurer, all within the first few hours. Your policy requires you to prevent further damage, and mitigation companies are used to working with adjusters and often bill insurance directly.
Is it safe to stay in a house with water damage?
Usually yes for small, clean-water leaks once electricity is safe. For sewage backups, major flooding, or any electrical uncertainty, stay elsewhere until a professional clears it. Never sleep in a room with visible standing water or active mold.
Can I dry it out myself with fans?
For a small clean-water spill caught immediately, sometimes. For anything that soaked drywall, flooring, or lasted more than a few hours, household fans can't dry inside walls and under floors, and hidden moisture is what causes mold. A professional assessment with a moisture meter is cheap insurance.