Basement Flooded? Here's Exactly What to Do in the First Hour

Before Anything Else: Electrical Safety

Standing water and electricity are immediately lethal in combination. Before entering a flooded basement, shut off power to the basement at your electrical panel. If your panel is in the basement and already surrounded by water, do not enter — contact your utility to disconnect power at the meter first.

This is not a risk to work around. Electrical current in standing water is invisible. A basement with 4 inches of water and a live outlet or submerged appliance can be lethal. Confirm power is off before any entry.

What to Do in the First 60 Minutes

Once electrical safety is confirmed, work through these steps:

• Identify the water source — Is water coming through the foundation wall, floor drain, window well, or from above? A burst pipe (Category 1) has different cleanup requirements than sewer backup or surface flooding (Category 3). Source identification matters for insurance classification.
• Stop the source if possible — Shut off the main water supply if a pipe or appliance is the source. For exterior flooding, identify entry points and focus on protecting valuables and documenting — don't attempt to block rising water.
• Photograph everything before cleanup — Document water depth against walls, waterline marks, all visible damage, affected contents, and the entry point. Video is better than photos alone. This is your insurance claim evidence.
• Move salvageable items off the floor — Electronics, important documents, photos, and valuables should be moved to higher ground. Furniture on wet flooring should have legs elevated or items moved out entirely.
• Call your insurer and a restoration company — Report the claim and call a licensed restoration contractor simultaneously. You do not need adjuster approval to begin extraction — delaying mitigation can give the insurer grounds to reduce the claim.

Determining the Cause Matters for Coverage

The cause of basement flooding is critical for both cleanup protocols and insurance coverage. A supply pipe failure is Category 1 water, typically covered by standard homeowners insurance. Sewage backup through a floor drain is Category 3 and requires a specific endorsement. Groundwater rising through the foundation during heavy rain is flood damage, requiring flood insurance.

Restoration contractors are experienced at identifying water source from the pattern of entry and water characteristics. If you're uncertain, document what you observe and let the adjuster and contractor make the determination — but know that the classification affects both cleanup approach and which policy applies.

After Extraction: What Comes Next

Removing standing water is step one. The walls, floor, and structural components of the basement remain saturated after extraction. Industrial drying equipment must run for 3–5 days to bring moisture levels in concrete, framing, and remaining materials to safe levels.

Finished basements with drywall, carpet, and insulation require assessment of every layer. Drywall below the waterline almost always requires removal to dry framing behind it and prevent hidden mold. Carpet and pad in a flooded basement are rarely salvageable. Determination of what can be dried in place vs. removed should be made with moisture meter readings, not appearance alone.