What to do if your basement floods

Before anything else, check for hazards. If there’s any chance of electrical danger (downed power lines, water near outlets/panels, sparking, or burning smells), step back and call your utility or emergency services.

Wear protective gear if you can (gloves and closed-toe shoes). Avoid walking through deep or fast-moving water, and don’t touch anything electrical in standing water. If you feel unwell or the area has strong sewage odors, treat it as potentially contaminated and get help sooner.

If you can do so safely, reduce additional water flow by shutting off the source (for example, the main water valve for a broken pipe). Then ventilate the space and keep people and pets out.

Once it’s safe, take photos and short notes of what was affected. This can be useful for insurance discussions later. Try to identify the water source if you know it (clean water from a supply line vs. dirty water from drains).

Start water removal as soon as you can. Use pumps or wet vacuums rated for water if available, and follow the equipment instructions. In most cases, the sooner you begin controlled drying, the better your chances of limiting damage to drywall, insulation, wood, and stored items.

Drying usually requires dehumidification and airflow. Dehumidifiers pull moisture out of the air; air movers (fans made for drying) help move water vapor away from wet materials. Certified teams also monitor conditions to adjust the process.

Not everything should be cleaned the same way. Materials like drywall, insulation, carpets, and some wood can hold moisture and may require removal depending on how long they were wet and how contaminated the water is.

If the water involved sewage or flooding from outside, cleanup typically requires more careful disinfection and protective steps. If you’re unsure whether the water is clean or contaminated, it’s reasonable to wait and get professional guidance before beginning aggressive cleanup.

Also watch for mold risk. Mold can start growing when materials stay damp. If you see active growth, have a strong musty odor, or the area stayed wet for more than a short period, consider getting certified help quickly. Learn more in What to do right now.

If you have homeowners or renters insurance, contact your insurer as soon as you safely can. Ask what documentation they need and what they require before repairs begin. Keep receipts for equipment rentals (like fans or dehumidifiers) and any storage or disposal costs.

Costs vary widely. As a rough estimate, many basement water-damage restoration jobs often range from a few thousand to much more depending on severity, drying complexity, affected materials, and local pricing. In some larger or heavily contaminated cases, costs can rise further—so it’s important to get a local assessment.

For helpful next steps, see what to do next and services.

When the damage is significant—or if you’re dealing with sewage contamination, extensive drywall removal, or lingering odor—working with a certified restoration professional can help you manage the drying and restoration process more reliably.

Steady Restore is a free information and matching service for property owners in the US. We connect you with certified home restoration pros near you. You only provide general contact details—no medical records, and no identity documents are needed.

If you want, you can start here: get matched.