Basement Flooding: Do These 6 Things Before Anything Else

There is water in your basement right now. We know. That is why you searched this, and you do not have time to read a long introduction. Here are the six things to do before you touch anything else.

Step 1: Electricity First, Always

Do not enter a flooded basement if water is near electrical outlets, the main panel, a sub-panel, or any plugged-in appliance. Water and electricity together are lethal. This is not a situation where you assess the risk and decide it is probably fine.

If you have any doubt about the electrical situation, call your power company and ask them to cut power to the structure before you go downstairs. In the Portland area, call PGE at 1-800-544-1795. In Clark County, call Clark Public Utilities at (360) 992-3000. They respond to safety hazards around the clock.

If the breaker panel is in a dry area on a floor above the flooding, you can shut off power to the affected zone yourself. If the panel is in the basement and water has reached it, do not touch it. Call the utility first.

Step 2: Call a Restoration Company Before You Start Cleaning

The IICRC S500, the industry standard for water damage restoration, makes one thing clear: the damage clock starts the moment water contacts building materials. Wood framing, drywall, insulation, and flooring begin absorbing water immediately. Mold can begin establishing in 24 to 48 hours on wet organic material.

If you spend a day moving things around, renting a shop vac, and running box fans before calling a restoration crew, that is a day of absorbed moisture you cannot get back with fans alone. Professional drying equipment, LGR dehumidifiers and high-velocity air movers, removes moisture from inside the structure, not just the surface. Consumer equipment cannot do that.

Step 3: Document Everything Before Moving Anything

Before you move a single item, get your phone out and record a video walkthrough of the basement. Then take still photos. You want to capture:

• The water level and how far it extends across the floor
• Every corner and wall, including where water meets the base of drywall
• Any items sitting in standing water
• The apparent source, if visible (a cracked wall, a backed-up floor drain, a failed water heater)

This documentation is what your insurance adjuster uses to approve your claim. The adjuster was not there when it happened. Photographs taken before anything was disturbed carry far more weight than after-the-fact descriptions of what the damage looked like. Walk every corner of the space and get the timestamp on the photos.

For a detailed walkthrough of the claims process, see our guide on insurance claims assistance.

Step 4: Do Not Use a Shop Vac If the Water Is Category 2 or 3

Not all basement water is the same. The IICRC classifies water into three categories based on contamination level:

• Category 1 (clean water) comes from a supply line, a pressurized pipe, or a clean water appliance like a water heater or dishwasher supply hose. This is the most recoverable.
• Category 2 (gray water) has a degree of contamination. Water from a washing machine discharge, a toilet overflow with urine but no feces, or a dishwasher drain failure falls here. It is not safe to handle without protection.
• Category 3 (black water) is grossly contaminated. Sewage backup, floodwater from outside the structure, and any water that has been sitting long enough to harbor bacterial growth qualify as Category 3.

Here is why the category matters for your shop vac: a standard shop vac aerosolizes contaminated water as mist. If the water is Category 2 or 3, you are spraying bacteria, sewage particles, or pathogens into the air of the space, where they land on every surface and settle into the HVAC system if it is running. This turns a contained cleanup into a whole-house contamination problem.

If the water smells off, has any color, came up through a floor drain, or came in from outside, stop. Wait for pros with proper PPE and containment equipment. For sewage events specifically, our flooded basement restoration team works under full contamination protocol.

Step 5: Move Salvageable Items Out

This step only applies if you have confirmed two things: the power is cut or confirmed safe, and the water is Category 1 clean water. If either of those conditions is not met, skip this step entirely and wait for the crew.

If both conditions are met, carry out items that are dry or only lightly wet and can be saved: boxed belongings on shelves that have not reached the water line, lightweight furniture that you can carry without dragging through the water, tools that are still in cases. Move them to a dry area of the house or to the garage.

Spread items out so air can circulate around all surfaces. Do not stack wet items on top of each other. Do not move a waterlogged sofa, bookcase, or appliance without another person helping, both for safety and to avoid dropping it and causing more damage.

Items that are already saturated, carpet, rugs, cardboard boxes, upholstered furniture sitting in water, are almost certainly a write-off. Do not injure yourself moving them. Leave them for the restoration crew, who can document them for the insurance file before removal.

Step 6: Call Your Insurance Agent

Do this while the restoration crew is en route, not after the cleanup is underway. Reporting the loss early establishes the timeline as urgent and accidental, which matters for coverage decisions.

When you call, ask specifically:

• Is water damage from this type of event covered under my policy?
• Does my policy cover emergency mitigation services?
• If this is a finished living space, am I covered for Additional Living Expenses while the space is unusable?
• What is my deductible for water damage losses?

Most standard HO-3 homeowners policies cover sudden and accidental water losses, and most cover emergency mitigation as part of that coverage. Get a claim number from the agent before you hang up. Give it to the restoration crew when they arrive. RescueHero bills your insurance carrier directly and documents the full scope of loss for your file.

What Happens When RescueHero Arrives

When our IICRC-certified technicians arrive, the first thing they do is moisture mapping. Calibrated meters measure how far water has wicked into the concrete slab, wood framing, drywall, and any finished surfaces. The reading establishes the scope of the loss for your insurance file before extraction begins.

Extraction follows, pulling standing water with truck-mounted pumps and high-capacity wet-vac equipment. Then industrial LGR dehumidifiers and high-velocity air movers are staged throughout the space to begin drying the structure from the inside out. Daily moisture readings track progress and are logged for your adjuster.

The drying phase typically takes three to five days for a standard residential basement, depending on the Class of loss under IICRC S500. If drywall or flooring must be removed to dry the structure, our construction division handles the rebuild from the same crew. One call, one team, from emergency extraction through finished floors.

If you are reading this right now with water in your basement, stop here and call. The six steps above take minutes. The call takes less than that.