What should I do immediately after water damage?
Short answer
Stop the water source if it's safe to do so, cut power to affected areas, remove standing water and wet items, and begin drying within 24-48 hours to limit mold growth, which the EPA identifies as the key window before mold can take hold.
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First hour
- Stop the water source (shut off the supply or wait for a professional if it's structural, like a roof leak).
- Cut power to any outlets or fixtures in the wet area at the breaker.
- Move furniture, rugs, and belongings out of standing water.
- Photograph the damage before you start cleanup, for insurance.
- Start air movement — fans and open windows if humidity outside is lower than inside.
Why the 24-48 hour window matters
The EPA notes mold can begin growing on damp materials within 24 to 48 hours. Wet drywall, carpet padding, and insulation that stay damp beyond that window are far more likely to need removal rather than drying in place.
What to remove vs. dry in place
- Carpet padding soaked by contaminated water: typically removed, not dried
- Drywall wet more than a few inches up: often cut out
- Solid wood furniture: usually salvageable with prompt drying
- Documents and photos: freeze if you can't dry them immediately
Related questions
Can I use a household fan and dehumidifier instead of hiring a company?
For small, clean-water spills, that can work if you're dry within 24-48 hours. Larger areas, contaminated water, or damage behind walls generally need professional extraction and drying equipment.
Should I call my insurer before or after cleanup starts?
Call early. Insurers generally want documentation of the damage, and many expect prompt mitigation, so don't wait to notify them while you begin the safe first steps.
Is it safe to walk through standing water near outlets?
No. Treat any standing water near electrical outlets or panels as a shock hazard until power to that area is confirmed off.
Sources
- Mold Course Chapter 2: Moisture, Mold and Your Home — U.S. Environmental Protection Agency
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