What to Do in the First 24 Hours After Water Damage

Published 2026-06-01

Water damage is a race against the clock. Whether it's a burst supply line in a Naperville basement, a failed sump pump after an Illinois thunderstorm, or an overflowing appliance, the clock starts the moment water touches your floors and walls. Within 24 to 48 hours, drywall swells, hardwood cups, and mold begins to colonize. What you do in that first day has an outsized effect on your final repair bill and how long your property is out of commission.

Here's the sequence that protects your property and your insurance claim.

1. Stop the source — safely

You can't dry out a space that's still taking on water. If it's safe to do so:

For a burst or leaking pipe, shut off the main water valve (usually near where the line enters the home, or at the street).
For an appliance leak, close the dedicated supply valve behind the washer, dishwasher, or water heater.
For a roof or storm leak, contain it with buckets and tarps and stay out from under sagging ceilings.

If water is anywhere near outlets, the panel, or appliances, do not wade in — cut power at the breaker only if you can reach it without standing in water, otherwise call an electrician or your utility.

2. Protect people and belongings

Get people and pets out of affected rooms. Lift what you can — rugs, electronics, documents, furniture legs onto blocks or foil — and move valuables to a dry area. Speed here prevents secondary damage to things that are still salvageable.

3. Document everything before you clean up

This step pays for itself. Before you move or remove anything, take wide photos and video of every affected room, plus close-ups of damaged materials and the source. Save receipts for anything you buy during the emergency. Thorough documentation is the single best protection for your insurance claim — it's hard to get reimbursed for damage you can't prove.

4. Start removing water you can reach

Mop or towel up standing water and run fans to start air movement. But know the limits: surface water is the easy part. Moisture wicks into drywall, subfloor, and wall cavities where household fans never reach — which is exactly where mold starts.

5. Call a restoration professional — fast

The faster professional extraction and structural drying begin, the less you lose. Restoration crews use truck-mounted extractors, commercial air movers, and dehumidifiers, and they use moisture meters to confirm materials are dry inside the wall, not just on the surface. Fairvest answers 24/7 and can walk you through next steps the moment you call (630) 474-5128.

What to avoid

Don't use a household vacuum on standing water — it's an electrocution and equipment-damage risk.
Don't wait to "see if it dries on its own." It usually doesn't, and the hidden moisture is what causes mold and rot.
Don't throw away damaged items before they're documented.
Don't assume insurance won't cover it — sudden, accidental water damage is often covered. File the claim and let the facts decide.

Does homeowners insurance cover water damage?

It depends on the cause. Sudden and accidental events — a burst pipe, an appliance failure, a storm-driven roof leak — are commonly covered. Gradual problems from long-term neglect, and most surface flooding from rising water, typically are not (flooding usually requires separate flood insurance). The key is acting fast and documenting, because carriers look closely at how quickly you mitigated the damage.

Mold can take hold within two days, so don't let the first 24 hours slip away. If your property is taking on water right now, reach out or call us 24/7 — a fast response is the cheapest insurance you have.