What to Do If Your Basement Floods: A Step-by-Step Guide
Short answer: If your basement floods, stay out until the power to the basement is off, then stop the water source, photograph the damage, remove standing water and start drying within 24 to 48 hours. Find out whether the water came from plumbing, a sump pump, the sewer or outside, because the cause decides the cleanup and the insurance claim.
Water has found the lowest point in the house. Maybe the sump pump quit during a storm, the water heater gave out, or dirty water came up through the floor drain. Whatever happened, the next few hours matter. If you need help now, Reestorian can connect you with a local provider for basement flood cleanup in Littleton. Then use this checklist to protect your family, your home and your claim.
This is general information, not insurance or legal advice. Check your policy and talk with your agent.
What to do if your basement floods: 10 steps
- Put safety first. Don't walk into standing water until you know the power to the basement is off. Water and electricity together can kill.
- Shut off power from a dry location. If you can reach the breaker panel without stepping in water, turn off the circuits that serve the basement. If the panel is in the flooded area, call an electrician or the utility. The CDC says never to switch power on or off while standing in water.
- Leave if you smell gas. Get everyone out and call the gas utility from outside.
- Stop the water if it's safe. Shut off the main water valve for a plumbing or appliance leak. Stop using sinks, toilets and the washer if water is coming up through a drain.
- Document the damage. Take photos and video of the water level, the source and every damaged item before you move anything.
- Call for help. Call a restoration provider for extraction and drying, a plumber for the source and your insurer to report the loss.
- Remove standing water. Pumps and extractors clear water fastest. A wet vac works for small amounts on concrete.
- Sort belongings. Move what's dry upstairs. Set aside wet items for drying or disposal, and list everything for the claim.
- Dry the basement. Run fans and a dehumidifier, or let a provider set commercial equipment with daily moisture readings. Aim to dry within 24 to 48 hours.
- Fix the cause before you put finishes and belongings back.
Basement taking on water right now? Call to reach a local basement flood cleanup provider.
Call (928) 394-5135Why is my basement flooding?
Finding the source tells you how to stop it, how to clean up and whether insurance will help.
| Source | How to recognize it | What to do |
|---|---|---|
| Sump pump failure | Water rising from the sump pit, often during storms or power outages | Check power and the float; see sump pump failure |
| Water heater | Water spreading from the tank or utility room | Close the cold-water valve to the heater; turn off its power or gas |
| Burst or leaking supply line | Clean water spraying or dripping from a wall or ceiling | Shut off the main valve |
| Washing machine | Water around the washer or from a split hose | Turn off the washer valves; replace hoses |
| Sewer backup | Dirty, smelly water from a floor drain or basement toilet | Stop using all plumbing; call a plumber |
| Window wells | Water coming in at a basement window after rain or snowmelt | Clear the well; check grading and downspouts |
| Foundation seepage | Water at the base of walls or through cracks after storms | Improve drainage; ask about waterproofing |
| Outside flooding | Water flowing in from the yard or street | Treat as contaminated water; check flood insurance |
Is the water clean or contaminated?
How you clean up depends on what's in the water:
- Clean water from a supply line or water heater can often be dried, and carpet may be saved.
- Gray water from a washing machine or dishwasher has soap and soil and needs cleaning and sanitizing.
- Black water from a sewer backup or outside floodwater can carry bacteria and viruses. Porous materials it touched usually have to go.
For the full explanation, see Category 1, 2 and 3 water.
How to clean a flooded basement
| Material | Usually | Notes |
|---|---|---|
| Carpet pad | Throw away | Pad soaks up water and rarely dries well |
| Carpet | Dry if clean water and caught fast | Discard after sewage or floodwater |
| Drywall | Cut out the wet part | A flood cut 12 to 24 inches above the water line lets the wall dry |
| Insulation | Remove if wet | Wet insulation holds water against framing |
| Wood furniture | Clean, dry slowly | Keep out of direct sun to limit warping |
| Upholstered furniture and mattresses | Often discard after contaminated water | The CDC lists them among items to throw out after floods |
| Concrete floor | Clean and dry | Slabs hold moisture for days; check with a meter |
The CDC advises rubber boots, rubber gloves and goggles when sewage may be involved, and never mixing bleach with ammonia or other cleaners.
Does homeowners insurance cover basement flooding?
It depends on the cause:
| Cause | Usual coverage |
|---|---|
| Sudden burst pipe or appliance leak | Often covered by a standard homeowners policy |
| Sewer backup | Usually needs a sewer or water backup endorsement |
| Sump pump overflow | Usually needs a water backup endorsement |
| Outside flooding or groundwater | Not covered by homeowners; needs flood insurance |
| Slow leak or poor maintenance | Often excluded |
The Colorado Division of Insurance says homeowners policies don't cover flood losses, and damage from rainwater or broken sprinklers is typically excluded. The City of Littleton adds that standard homeowners and flood policies typically don't cover sewer backups or sump pump overflow, but that backup coverage can usually be added. FloodSmart notes that NFIP flood policies usually take effect 30 days after purchase. Read your declarations page now, before you need it.
Need water pumped out and the basement dried before mold starts? Call now.
Call (928) 394-5135Finished basements in Littleton
Many Littleton homes have finished lower levels with carpet, drywall and built-ins, often on clay soils that swell when wet. A finished basement hides water: it runs under walls, soaks the bottom of drywall and sits in the slab long after the carpet feels dry. That's why moisture meters, not touch, should decide when drying is done. Pulling equipment too early is a common reason a basement smells musty weeks later. If that happens, see mold in the basement.
Who to call when your basement floods
| Call | When | Why |
|---|---|---|
| 911 or the gas utility | You smell gas or there's an electrical hazard you can't safely control | Life safety first |
| An electrician or the electric utility | The breaker panel is in the flooded area | Safely cut power |
| A plumber | A pipe, water heater or sewer line is the source | Repair the source and clear the line |
| A water damage restoration provider | Water reached carpet, drywall or a finished room | Extraction, drying and documentation |
| Your insurance agent or insurer | Any significant loss | Start the claim and confirm coverage |
| The City of Littleton Public Works Department | You suspect the city's sewer main is blocked | City crews handle main lines |
How to prevent basement flooding during heavy rain
Summer thunderstorms are the main flood risk in Littleton. Before storm season:
- Clean gutters and downspouts, and extend downspouts at least several feet from the foundation
- Check grading so soil slopes away from the house
- Add window well covers and keep the wells clear of leaves
- Test the sump pump and backup before spring
- Keep valuables off the floor in plastic bins on shelves
- Know your flood zone and consider flood insurance; see Littleton flood zones and FEMA maps
How to prevent basement flooding
- Test the sump pump. NDSU Extension suggests pouring water into the pit until the pump starts and watching it cycle at least twice.
- Add a battery backup so the pump keeps running during a power outage.
- Keep the discharge line clear of snow and ice and pointed away from the house.
- Replace washing machine hoses and check water heater pans.
- Clear window wells and add covers.
- Grade soil away from the foundation and extend downspouts.
- Don't tie sump pumps or French drains into the sewer. The City of Littleton says not to connect them.
- Keep grease and wipes out of drains to reduce sewer backups.
- Add water backup coverage to your policy.
Local note: Basement floods are common across the area. In Highlands Ranch and Castle Rock, many newer homes rely on sump pumps. In Englewood, older foundations and garden-level apartments take on water first. In Centennial, finished basements span homes from the 1970s on.
Related reading: If the pump was the problem, see sump pump failure: signs and what to do. If water came from outside, check Littleton flood zones and FEMA maps.
When should you call a basement flood professional?
Call a professional when:
- Water is deeper than an inch or two, or covers most of the floor
- Carpet, drywall, furniture or a finished room got wet
- The water came from a sewer line or from outside
- Water sat for more than a day
- You smell mustiness after the floor seems dry
Basement flooded in Littleton? Call (928) 394-5135 to reach a local basement flood cleanup provider.
Frequently asked questions
How long can water sit in a basement before mold grows?
The EPA says mold usually won't grow if wet materials are dried within 24 to 48 hours. After that, carpet pad, drywall and wood in a basement are at real risk. The cooler, more humid air in basements makes fast drying even more important.
Does renters insurance cover a flooded basement?
Renters insurance may cover your belongings when the cause is a covered peril, such as a burst pipe. It usually doesn't cover flooding from outside, and sewer backup often needs an endorsement. The landlord's policy covers the building, not your things.
Should I use a shop vac or call a pro?
A shop vac can handle a small amount of clean water on concrete. For water deeper than an inch or two, water on carpet or drywall, or sewage, call a professional with pumps, extractors and commercial drying equipment.
Can I go into a flooded basement?
Not until you're sure the power to the basement is off and there's no gas smell. The CDC warns never to touch electrical equipment or switch power while standing in water. If the breaker panel is in the flooded basement, call an electrician or the utility.
Is it safe to use the washing machine or toilet after the basement floods?
Not if the water came up through a floor drain or basement toilet. That points to a sewer backup, and using plumbing sends more water down the line. Wait until a plumber clears the line.
Sources
- CDC: Guidelines for Cleaning Safely After a Disaster
- City of Littleton: Facts About Sewer Backups
- EPA: A Brief Guide to Mold, Moisture and Your Home
- Colorado Division of Insurance: My homeowners insurance doesn't cover what?
- FloodSmart (NFIP): Buy a Flood Insurance Policy
- NDSU Extension: Now is the time to check your sump pump
Related guides
Sump Pump Failure: Warning Signs, Causes and What to Do
How sump pumps work, the warning signs of failure, what to do when the pit overflows and how to test and back up your pump.
Mold in the Basement: Causes, Removal and Prevention
Why Colorado basements grow mold, how to get rid of it safely, when to call a pro and how to keep it from coming back.
Basement full of water?
Call to reach a local provider for basement water removal and drying in Littleton.