Skip to content

What Do I Do in the First Hour of a Basement Flood or Sewage Backup?

What Do I Do in the First Hour of a Basement Flood or Sewage Backup?

The straight answer
Stay out of danger. Stop the water safely. Call for help.

Keep everyone out of the flooded area, avoid electrical hazards, and stop using water if sewage is backing up. If the water can be shut off safely, do that. Photograph the damage from a safe place and call an emergency restoration company.

Never walk into standing water to reach a breaker. Treat sewage as contaminated.

Who's giving this advice? We're Bedrock Restoration, a Twin Cities water damage and sewage cleanup company. We also own Bedrock Plumbing & Drain Cleaning. We're not electricians, insurance agents, or lawyers. Electrical danger belongs with a qualified electrician or emergency responder. Ask your agent or adjuster about insurance coverage.

It's 11 p.m. You walk downstairs and find two inches of water across the basement floor. Maybe a pipe broke. Maybe the sump pump stopped. Maybe wastewater is coming up through the drain. You ask AI what to do and get advice about towels and wet vacuums. That skips the first question: is it safe to enter? Here is what actually matters in the first 60 minutes.

1

What should I do in the first 5 minutes of a basement flood?

Keep people and pets out until electrical and contamination hazards have been assessed. The water may be touching wiring, equipment, or outlets you cannot see. A floor drain may be bringing sewage into the home.

The CDC's flood safety guidance warns against handling electrical equipment while standing in water.

  • Keep everyone away. No children or pets in the flooded area.
  • Avoid electrical hazards. Never enter water to unplug equipment or reach the breaker panel.
  • Watch for serious hazards. Gas odors, damaged wiring, and structural damage may require emergency responders.
  • Look from a safe spot. Notice whether water is coming from a pipe, sump area, or floor drain.
Safety comes before saving belongings. If the basement is unsafe to enter, leave the area alone and call qualified help.
Basement floor right after a sewage backup with residue spread across the tile
2

How do I stop the water from getting worse?

The source determines the response. Stopping a broken water line, addressing a failed sump pump, and handling sewage require different work.

What is causing the flood?
Burst supply pipeShut off safely accessible valve
Sump pump failureProfessional pump / drainage check
Sewage backing upStop unnecessary water use

A shutoff valve may stop an indoor supply leak if it can be reached without entering water. An electrical hazard changes what is safe to do. If sewage is backing up, toilets, showers, and washing machines can add more wastewater to the problem. See the CDC's wastewater system guidance.

Why Bedrock is different: We own Bedrock Plumbing & Drain Cleaning. Our plumbing and restoration teams can coordinate source repairs and drying in one response.
3

Is sewage backup dangerous even if there is only a little water?

Yes. Sewage can contain harmful germs, regardless of how shallow the water looks. Keep people and pets away from affected areas.

Wastewater can soak into carpet, drywall, storage boxes, and insulation. Some absorbent materials may need to be removed rather than simply dried. The CDC warns about contaminated floodwater.

Bleach by itself does not fix contamination in porous materials. Never mix cleaning chemicals. Professional cleanup may involve removing unsalvageable materials, cleaning and disinfecting appropriate surfaces, and drying the building.

4

Should I take pictures before cleanup starts?

Yes, when taking photos is safe. Pictures help record where water reached and what belongings were affected. They also help an adjuster understand the loss.

Photos from the top of basement stairs can be useful. Nobody needs to step into a flooded room to collect evidence. A restoration crew can document areas that are unsafe for a homeowner to access.

Bedrock Restoration records moisture readings, damaged materials, and the work needed. Your insurance agent or adjuster decides coverage. The Minnesota Department of Commerce provides additional homeowners insurance guidance.

5

Should I start removing basement water myself?

Limited clean water may be manageable when the area is confirmed safe. Sewage, unknown water sources, or major flooding usually call for professional assessment.

A wet vacuum may remove visible water. It cannot prove that water underneath flooring or behind walls has dried. Household cleanup equipment also cannot establish that sewage contaminated materials are safe to keep.

Do not enter an electrically unsafe or contaminated area to save money on cleanup. The hidden damage can be significant, and health and safety hazards require proper handling.
6

How quickly does a flooded basement need to be dried?

Drying needs to start as soon as the area is safe. The EPA recommends cleaning and drying wet materials within 24 to 48 hours, when possible, to reduce mold risk.

EPA drying guidance
24 to 48 hours

A target for cleaning and drying water damaged materials, not a guarantee that mold cannot grow earlier.

Temperature, humidity, and the building materials affect the outcome. Sewage changes which materials can be cleaned and kept. See the EPA's guidance for flooded homes.

Insurance questions can continue while qualified professionals address urgent drying needs. Read about our water damage restoration services.

7

Should I call my insurance company or a restoration company first?

Both calls matter. A restoration company addresses the physical damage. Your insurance agent or adjuster explains the policy, reporting requirements, and coverage.

Water backup and sump pump failures often require special coverage. The Minnesota Department of Commerce is a useful starting point for policy questions.

Bedrock documents the loss and communicates with adjusters about the repair work. We're independent of insurer preferred vendor networks. Minnesota homeowners generally have a choice of contractor, subject to their policy and circumstances.

We use Xactimate to prepare itemized estimates. Lower estimates may reflect a smaller work scope, but quantities and pricing assumptions can vary too. See our water damage cost guide.

Moisture meter reading saturated on wet basement concrete beside the wall framing
8

What happens when an emergency restoration company arrives?

Crews assess hazards first, determine where the water traveled, and establish the proper cleanup and drying plan. Sewage and clean water losses require different handling.

  • Assess the source and hazards. Plumbing repairs can be coordinated when needed.
  • Document the loss. Photos, readings, and written records show affected areas.
  • Remove water or contaminated materials. The necessary work depends on the source and materials.
  • Dry and monitor. Moisture checks help confirm drying progress.
  • Plan reconstruction. Damaged drywall, flooring, or finishes may need rebuilding.

Our restoration team can handle water removal through reconstruction. When a claim is involved, Bedrock can share work documentation with the adjuster. The insurer remains responsible for its coverage decision.

The bottom line

The first hour is about keeping people safe, stopping the source when possible, and getting qualified help. Sewage requires additional caution. Clean looking water can still cause hidden damage.

0 to 5 min
Keep people out of danger. Avoid flooded electrical equipment.
5 to 15 min
Observe the source safely and shut off supply water only when accessible without risk.
15 to 30 min
Call emergency plumbing or restoration help. Take safe photos.
30 to 60 min
Contact your insurer and coordinate next steps without delaying necessary emergency safety measures.

These times are a practical guide, not strict deadlines. Urgent hazards always come first. Bedrock Restoration can coordinate plumbing, cleanup, drying, and reconstruction for Twin Cities homeowners.

Quick answers

What is the first thing to do when a basement floods?

Keep people and pets out of the flooded area and look for hazards from a safe location. Water near electrical equipment can cause serious injury. A safely accessible water shutoff may stop additional flooding. Otherwise, call qualified emergency help.

What should I do immediately if sewage backs up into my basement?

Avoid contact with sewage and stop unnecessary water use throughout the house. Sewage may contain harmful germs even when there is very little water. Plumbing and restoration professionals can investigate the backup and safely address contamination.

Is it safe to walk through a flooded basement?

Floodwater may hide electrical hazards, sewage, or structural problems. Never enter standing water to reach outlets, breakers, or electrical equipment. A qualified professional may need to determine when entry is safe.

Should I turn off the electricity if my basement floods?

Power may need to be shut off, but only from a location that is completely dry and safe to access. Do not stand in water to operate a breaker or switch. A qualified electrician should handle an inaccessible or flooded panel.

Can I use a wet vacuum to clean up basement floodwater?

A wet vacuum may help with limited clean water when the area and equipment are safe. It is not suitable for sewage cleanup or many contaminated flooding situations. Hidden moisture may remain beneath flooring and behind walls.

How long can basement water sit before mold starts growing?

Mold can develop within 24 to 48 hours under favorable conditions and may appear sooner. The EPA recommends drying wet materials within that period when possible. Some materials require removal, especially after sewage exposure.

Do I need to throw away carpet after a sewage backup?

Carpet and padding contaminated by sewage often require disposal because they are hard to clean thoroughly. Some nonporous surfaces may be salvageable with appropriate cleaning. A qualified restoration professional can assess the materials.

Who do I call first for a sewage backup in Minnesota?

A drain cleaning or plumbing service can investigate the source of the backup. A restoration company can evaluate contaminated water and damaged materials. If a public sewer problem is suspected, the local municipality may also need to investigate.

Does homeowners insurance cover a flooded basement or sewage backup?

Coverage depends on the water source and policy wording. Sudden indoor pipe losses are often covered, while sewer and sump backups typically require additional coverage. Your insurance agent or adjuster makes the final coverage determination.

Can Bedrock Restoration handle both a broken pipe and basement flooding?

Yes. Bedrock Restoration handles cleanup, drying, and reconstruction, and our own Bedrock Plumbing & Drain Cleaning team can address plumbing failures. We can coordinate the source repair and restoration response. Our team documents the work and communicates with adjusters when applicable.
Bedrock Restoration logo

Basement flooded or sewage backing up?

Water spreads fast. Sewage adds contamination risks. Bedrock Restoration provides 24/7 emergency response across the Twin Cities, with plumbing support, documentation, drying, and reconstruction.

612-834-1501
The Bedrock Team

General information disclaimer: This guide is educational and not legal, insurance, medical, or electrical advice. Bedrock Restoration is a restoration company, not an insurance agency or law firm. Floodwater, sewage, damaged electrical systems, and unstable structures can be dangerous. Seek appropriate licensed professionals or emergency authorities for unsafe conditions. Coverage depends on policy terms and circumstances. Ask your agent or adjuster about claims. Cleanup methods and drying times vary.

Bedrock Restoration  ·  612-834-1501  ·  Twin Cities 7-County Metro, MN  ·  bedrockrestoration.com
NEED HELP NOW?

Let’s Get Your Home Back to Normal

When damage happens, you don’t have to face it alone. We’re here to restore your space and your peace of mind.

bedrock-restoration-logo
WRITTEN BY

Bedrock Restoration

— CONTACT

Ready to Restore Your Property?

Professional restoration services designed to bring your home back to life—quickly, safely, and with lasting results.

Licensed · Insured · Locally Trusted