I found water in my house — what do I do in the first hour?

Q: I found water in my house — what do I do in the first hour?

In the first hour: stop the water at the main shutoff valve, stay out of any water near electricity, photograph and video everything before moving it, move valuables out of the water, and start removing standing water. The EPA says to dry water-damaged areas within 24 to 48 hours to prevent mold growth — so the first hour is about stopping the damage clock. For anything beyond a small mop-up, call a qualified water-mitigation crew next.

Tygart Media · Water Damage Guides · The first hours

QUICK ANSWEROriginally published at waterdamage.tygartmedia.com · Reviewed October 4, 2026

The short answer: stop the water, then stay safe. Shut off the main water valve, stay out of any water that’s near electricity, photograph and video everything before you move it, move valuables out of harm’s way, and start getting standing water out. The EPA says to dry water-damaged areas and items within 24 to 48 hours to prevent mold growth — the first hour is about stopping the damage clock. For anything beyond a small mop-up, a qualified mitigation crew is your next call.

Minute 0–10: Stop the source

Water doing damage right now beats everything else. Find your main water shutoff valve — usually where the line enters the house, in the garage, a utility closet, or the basement — and turn it off. If the water is coming from a specific appliance (water heater, washing machine, toilet supply line), most have their own shutoff valves right at the unit, and those are faster. Not sure where it’s coming from? →

Know where your main shutoff is before you need it. If you’re reading this in a dry moment, go find it now. It takes two minutes and it will save you thousands someday.

Minute 10–20: Stay safe around power

This is the one step people skip in the rush, and it’s the one that can hurt you. If water is anywhere near outlets, light switches, the breaker panel, or wiring:

Do not wade into the water.
If you can reach the breaker panel from a dry spot, turn off the affected circuits. If you can’t reach it safely, don’t try — call your electric utility or an electrician and have the power cut.
Unplug nothing that requires standing in water to reach.

Wet carpet is miserable. Electrocution is worse. Electricity wins this argument every time.

Minute 20–30: Document everything before you touch it

Before you move a single thing, walk the whole affected area with your phone: video first, then still photos. Open closets, shoot behind furniture, capture the water lines on walls. This is the evidence your insurance claim will need later, and you only get one shot at the before-drying version. Our sibling site covers the claim side →

Minute 30–60: Start getting water out

Move valuables. Lift furniture onto blocks or foil, roll up area rugs, get boxes, electronics, and photos out of the wet zone.
Remove standing water. A wet/dry vacuum, a mop and buckets, or even towels for small areas. Get it off the floor.
Get air moving. If the power is safe, open windows if it’s dry outside, and point fans at the wet areas. This isn’t professional drying — it’s triage.
Call a mitigation crew for anything bigger than a mop-up. A qualified crew shows up with extraction equipment, air movers, dehumidifiers, and moisture meters — and the sooner they start, the less gets torn out later. What a good crew does →

Important Notice

If it’s sewage or flood water, stop and call a professional Water from a backed-up drain, a toilet (beyond the tank), or flooding from outside is a different category — it carries real contamination. Do not DIY this. Get out of the affected area and call a qualified restoration company. More on water categories →

Disclaimer

Informational only — not professional, medical, or insurance advice.

Water damage situations vary widely. This is general guidance, not a substitute for a qualified contractor or licensed professional. If anyone in the home has breathing difficulties or other health concerns, talk to a medical professional.

The first hour, in order

First-hour water damage response
Minute	Action	Why first
0–5	Stop the water — main shutoff valve	Every minute of flow is more damage
5–15	Kill power to wet areas at the breaker	Water + electricity kills
15–30	Photograph everything before touching it	Your claim depends on this evidence
30–45	Move valuables; start extracting water	Porous materials start growing mold in 24–48 hours
45–60	Call insurance + a restoration company	Mitigation duty: your policy requires you to prevent further damage

Next Step & Source Attribution

Continue navigating Water Damage Guides

Source: Originally published at https://waterdamage.tygartmedia.com/first-hour/ · Author: William Tygart, Tygart Media · Last reviewed October 4, 2026.