Heavy rain, tropical storms and overflowing bayous can push water into Houston homes, rentals and businesses with little warning. This guide is for the hours and days after floodwater gets inside: how to stay safe, what to document, and what professional flood cleanup involves. If you are still preparing for storm season, read our hurricane season preparedness guide instead.
Safety Comes Before Cleanup
Floodwater is considered contaminated. It can carry sewage, chemicals, fuel and debris. Follow guidance from local officials and these basics:
- Do not return until authorities say it is safe.
- Avoid wading through floodwater. It can hide open drains, sharp objects and live electrical current.
- Do not turn on power in a building that flooded until an electrician or the utility has checked it.
- Watch for structural damage, sagging ceilings and gas smells. If you smell gas, leave and call the gas company from outside.
- Never run generators indoors or in a garage because of carbon monoxide risk.
- Leave contaminated water to professionals. Floodwater and sewage require appropriate protective equipment, safe removal of porous materials and disinfection. Do not attempt this cleanup yourself.
What to Do in the First 24 to 48 Hours
- Contact your insurer. Flood damage from rising water is usually covered by a separate flood policy, not standard homeowners insurance. Report the loss as soon as possible.
- Document everything. Take photos and video of water lines on walls, damaged contents and outdoor conditions before anything is moved or removed.
- Keep receipts for emergency expenses such as temporary lodging.
- Arrange professional help for water removal and drying. See flood damage restoration.
Mitigation, Cleanup and Rebuilding After a Flood
Mitigation
Mitigation limits further damage: pumping out water, removing wet drywall and insulation, and starting drying.
Cleanup and sanitizing
Because floodwater is contaminated, porous materials it touched, such as carpet, pad, insulation and the lower portion of drywall, are commonly removed. Remaining surfaces are cleaned and disinfected.
Reconstruction
Rebuilding begins only after moisture readings confirm the structure is dry. Closing walls too early can trap moisture and lead to mold.
How Professional Flood Cleanup Works
- Extraction of standing water using pumps and extractors (water extraction).
- Flood cuts: removing drywall above the water line so wall cavities can dry.
- Structural drying with air movers and dehumidifiers, which is critical in Houston's humidity (structural drying).
- Moisture monitoring with meters, logged until materials reach a dry standard.
- Antimicrobial treatment of affected areas where appropriate.
For Landlords, Property Managers and Businesses
After a flood, prioritize tenant safety and communication. Confirm in writing which units are affected, whether they are habitable, and who is authorizing work. Commercial owners should document lost inventory and business interruption for insurance. See commercial water damage restoration and storm water damage for more.
Reducing Future Flood Risk
- Check your property's flood risk using official FEMA and Harris County flood maps.
- Review whether you have flood insurance; new policies typically have a waiting period before they take effect.
- Keep gutters, downspouts and nearby storm drains clear.
- Store important documents and valuables above likely water levels.
Frequently Asked Questions
Can I clean up floodwater myself?
Floodwater is contaminated and can carry sewage and chemicals. It requires professional handling with protective equipment. Limit yourself to documenting damage and keeping people safe.
Does homeowners insurance cover flooding in Houston?
Standard homeowners policies generally exclude flood damage from rising water. Separate flood insurance is usually needed. Check your own policy.
How soon can I rebuild after a flood?
Only after moisture readings confirm materials are dry. Rebuilding over wet framing risks mold and future damage.
Is mold likely after a flood?
Mold can begin growing on damp materials within a few days. Fast drying and removal of contaminated porous materials reduce the risk. See mold prevention.
Get Flood Cleanup Help in Houston
We are a referral service connecting Houston property owners with participating independent restoration professionals. Request a callback or quote once it is safe to do so.