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Guide · emergency steps

What to do in the first 24–48 hours

What to do the moment water hits — stop the source, protect your home, and document everything before cleanup begins.

In this guide

01Stay safe02Stop the source03Document everything04Mitigate further damage
Last updated 2026-07-06 · 4 min read

Last updated: 2026-07-06 · Reviewed by the DisasterStatus editorial team

Quick answer: Make sure it's safe (power off around standing water, stay out of a fire-damaged structure until authorities clear it), stop the source of the water, photograph and video everything before you move or discard anything, remove standing water and start drying, then call your insurer and a restoration pro. Wet materials that aren't dried within 24–48 hours can start growing mold (EPA), so the clock matters more than perfection.

After water, fire, or flooding, the first day or two decides how bad the damage gets. Water wicks into materials by the hour, and smoke and soot become more corrosive and harder to clean the longer they sit. Move through the steps below in order — safety first, then stop the source, then document, then mitigate, then call a pro. Not sure how far the water has spread? Learn the signs of water damage to check on walls, ceilings, and floors.

Stay safe

  • Don't enter standing water near outlets, appliances, or the electrical panel — never turn power on or off, or use an electric tool or appliance, while standing in water (CDC). If you'd have to enter standing water to reach the main switch, call an electrician instead.
  • After a fire, stay out until the fire department or authorities say it's safe to return (CDC). Once you're cleared to go back in, see smoke damage cleanup for how soot and odor are handled.
  • Watch for structural hazards and slick surfaces, and treat floodwater as contaminated — it can carry sewage, hazardous waste, and sharp debris (CDC) — so wear gloves and boots, and keep children and pets away.
  • If you smell gas or suspect the structure is unsafe, leave and call for help.

Stop the source

  • For a plumbing leak or burst pipe, shut off the water at the fixture or the main shutoff valve.
  • For a roof leak, place buckets and, if safe, tarp the area to keep more water out.
  • For an appliance failure, unplug and shut off the supply line.
  • You can't dry out a home that's still taking on water — stopping the source comes before everything else.

Document everything

  • Take wide and close-up photos and video of all damage before moving or cleaning anything — insurers expect a photo or video record of the loss and an inventory of damaged items (III).
  • Capture the source, the spread, and damaged belongings; note the date and time.
  • Start a written inventory of damaged items.
  • Keep receipts for anything you buy or pay for during the emergency.

Mitigate further damage

  • Remove standing water you can safely reach with a wet/dry vac, mop, or pump.
  • Move undamaged valuables, electronics, and documents to a dry area.
  • Lift furniture off wet carpet (foil or blocks under the legs prevents stains and rust).
  • Get air moving — open windows and run fans if humidity outside is lower than inside.
  • Don't make extensive permanent repairs until the claims adjuster has assessed the damage (III) — your insurer needs to see the loss first.

Call your insurer and a restoration pro

Open your insurance claim right away — insurers advise contacting your agent or company immediately after a loss (III) — and call a restoration professional. The DIY steps above buy time, but professional extraction, structural drying, and moisture mapping within the first day or two are what actually prevent mold and hidden structural damage. A vetted local pro will also document the loss in the format your adjuster expects. See our insurance claim guide for the full process.

Get a pro on the way

Time is the enemy here. Connect with a local water damage pro, a fire damage restoration pro, or a mold remediation pro — vetted, independent, and available fast.

Sources

Frequently asked questions

Why are the first 48 hours so important?
Wet materials that aren't dried within 24–48 hours can start growing mold, and water keeps wicking into drywall, insulation, and subfloor the entire time it sits. Acting fast is the single biggest thing you can do to limit both the damage and the cost.
Should I start cleaning up right away?
Stop the source and remove standing water and valuables, but photograph and video everything before you move or discard anything — your insurer will want to see the damage as it was. Don't make permanent repairs until the loss is documented and, ideally, seen by an adjuster.
Is it safe to use electricity or stay in the home?
If there's standing water near outlets or the panel, keep power off in affected areas and don't wade through water that may be energized. After a fire, don't re-enter until authorities say it's safe. When in doubt, leave and call a professional.
When should I call a restoration company?
As soon as the situation is safe and the source is stopped. Professional extraction and drying within the first day or two is what prevents mold and secondary structural damage — waiting is what turns a manageable loss into a major one.