Written by Complete Flood Restoration | Published on July 2025
When a flood hits your home, the first 24 to 48 hours are the most critical. Acting fast can prevent mold growth, structural damage, and thousands of dollars in additional repairs. This guide covers exactly what to do after a flood in your home, step by step, so you can protect your property and your family in San Antonio, TX.
Prioritize Safety Before You Enter the Building
Your safety comes first. Before you step back inside your home after a flood, there are serious hazards to check for. Floodwater can hide electrical dangers, structural instability, and contaminated water that poses real health risks.
Do not enter your home if the floodwater is still rising. Even a few inches of moving water can knock a person off their feet. Wait until local authorities confirm it is safe to return.
- Turn off the main electrical breaker before entering if it is safe to do so from outside the home.
- Do not use electrical appliances or switches if your floors are wet.
- Watch for gas leaks. If you smell gas, leave immediately and call your gas provider.
- Wear rubber boots, waterproof gloves, and a face mask when entering a flooded area.
- Check for structural damage like sagging ceilings, cracked walls, or warped floors before walking through.
- Keep children and pets out of the affected areas until cleanup is complete.
In San Antonio, floodwaters from heavy storms can carry sewage, chemicals, and bacteria. CPS Energy and San Antonio Water System (SAWS) both have emergency lines if you suspect utility damage. Do not assume utilities are safe just because the water has receded.
Document Everything for Your Insurance Claim
Before you move or remove anything, document the damage thoroughly. Insurance adjusters need clear evidence of what happened and what was affected. Skipping this step is one of the most common and costly mistakes homeowners make after a flood.
Use your phone to take photos and videos of every room, every damaged item, and any visible water lines on walls. Time-stamp everything if possible.
- Photograph standing water levels and watermarks on walls.
- Record serial numbers and model numbers of damaged appliances.
- Make a written list of all damaged or destroyed personal property.
- Do not throw anything away until your adjuster has seen it or given you the go-ahead.
- Save any receipts for emergency supplies you purchase during cleanup.
Call your homeowner’s insurance provider as soon as possible. Standard homeowner’s policies in Texas often do not cover flood damage. If you have a separate flood insurance policy through the National Flood Insurance Program (NFIP), contact that provider directly. The sooner you file, the faster you can move forward.
Remove Standing Water as Quickly as Possible
Standing water is your biggest enemy after a flood. Mold can begin growing in as little as 24 to 48 hours in warm, humid conditions. San Antonio’s climate, with average summer temperatures above 95 degrees Fahrenheit, makes this timeline even shorter.
The goal is to get water out fast. Here is a breakdown of common water removal methods and when to use them:
| Water Removal Method | Best For | Estimated Cost |
|---|---|---|
| Wet/Dry Shop Vacuum | Small amounts of water, less than 1 inch deep | $50 to $150 rental or purchase |
| Submersible Pump | Basement or room flooding over 2 inches deep | $100 to $300 rental |
| Mop and Buckets | Very minor surface water after main extraction | Minimal cost |
| Professional Extraction Equipment | Large-scale flooding, contaminated water, carpeted areas | Included in restoration service |
For significant flooding, professional water extraction equipment is far more effective than consumer tools. Complete Flood Restoration uses truck-mounted extraction units that remove water faster and more thoroughly than anything available for rent at a hardware store.
Once standing water is removed, use fans and dehumidifiers to begin drying the space. Open windows when outdoor humidity is low. In San Antonio’s humid summers, it is often better to keep windows closed and rely on air conditioning and dehumidifiers instead.
Understand the Timeline for Flood Damage Restoration
Many homeowners underestimate how long full flood restoration actually takes. The timeline depends on the severity of the flooding, the materials affected, and how quickly the drying process begins.
| Restoration Stage | Typical Timeframe | What Happens |
|---|---|---|
| Water Extraction | Within the first 24 hours | Standing water removed using professional equipment |
| Structural Drying | 3 to 5 days | Industrial dehumidifiers and air movers dry walls, floors, and subfloors |
| Mold Assessment | After drying is complete | Inspect for mold growth and treat if found |
| Demolition and Removal | 1 to 3 days | Damaged drywall, insulation, and flooring removed |
| Repairs and Reconstruction | 1 to 6 weeks depending on scope | Replace flooring, drywall, paint, and fixtures |
Minor flooding with quick response can be resolved in under two weeks. Severe flooding involving multiple rooms, contaminated water, or significant mold growth can take six weeks or longer. Acting fast in the first 24 hours has the biggest impact on the total timeline.
Watch for Mold and Contamination Risks Specific to San Antonio
San Antonio sits in a region prone to flash flooding, especially during the spring and fall storm seasons. The Edwards Aquifer recharge zone and the city’s low-lying neighborhoods near the San Antonio River face repeated flood risks. This means mold and contamination are recurring concerns for local homeowners.
Mold thrives in temperatures between 77 and 86 degrees Fahrenheit with humidity above 60 percent. San Antonio checks both boxes for most of the year. If your home was flooded with water from a backed-up sewer, storm drain, or outside source, that water is likely Category 3 water, also called blackwater.
Category 3 water contains bacteria, sewage, and other harmful contaminants. Carpets, drywall, and insulation soaked with blackwater typically cannot be salvaged. Attempting to clean them yourself puts your health at risk.
- Do not use a regular household vacuum on wet contaminated materials.
- Discard porous materials like mattresses, upholstered furniture, and rugs soaked in blackwater.
- Treat all affected surfaces with an EPA-registered antimicrobial solution before drying.
- Have a professional assess for hidden mold inside walls and under flooring.
Complete Flood Restoration handles mold remediation alongside water damage restoration, so you do not have to coordinate multiple contractors. That matters when time is short and damage is spreading.
Know What Repairs and Replacements to Expect
Once the drying and mold assessment phases are complete, the repair work begins. The cost and scope depend heavily on how long the water sat, what materials were affected, and whether contamination was involved.
Here is a general cost guide for common flood-related repairs in the San Antonio area:
| Repair Type | Average Cost Range (San Antonio) | Notes |
|---|---|---|
| Drywall Replacement | $1.50 to $3.50 per square foot | Includes labor and materials |
| Hardwood Floor Replacement | $6 to $12 per square foot | Engineered hardwood on the lower end |
| Carpet Replacement | $3 to $7 per square foot | Pad almost always needs replacing too |
| Mold Remediation | $500 to $6,000 depending on scope | Small area vs. whole-home treatment |
| HVAC Cleaning and Inspection | $300 to $800 | Required if ductwork was submerged or wet |
| Insulation Replacement | $1 to $2 per square foot | Wet insulation must always be replaced |
These are estimates based on typical San Antonio market rates in 2025. Your actual costs will vary depending on the extent of damage and your home’s construction. A licensed restoration contractor can provide a detailed estimate after an on-site inspection.
Texas does not require a specific state license for water damage restoration, but reputable companies hold certifications from the Institute of Inspection Cleaning and Restoration Certification (IICRC). Ask any contractor you hire whether they hold IICRC certification before work begins.
FAQs on What to Do After a Flood in Your Home
How long does it take for walls to dry out after a flood?
Walls typically take 3 to 5 days to dry with professional-grade air movers and dehumidifiers running continuously. Without equipment, walls can take 2 to 3 weeks or longer to dry, which dramatically increases the risk of mold. Drywall that was submerged for more than 24 hours often needs to be replaced rather than dried in place.
Can I stay in my home while flood restoration is happening?
It depends on the extent of the damage. If only one room or a small area was flooded and the rest of your home is dry and safe, you may be able to stay. If multiple rooms are affected, there is contaminated water involved, or mold has been found, staying elsewhere during the active restoration process is strongly recommended for your health and safety.
Will my homeowner’s insurance cover flood damage in San Antonio?
Standard Texas homeowner’s insurance policies do not cover flood damage. You need a separate flood insurance policy, typically through the NFIP or a private insurer. San Antonio is part of several FEMA-designated flood zones, particularly near the San Antonio River and Salado Creek, so flood insurance is worth having if you live in or near those areas.
How do I know if my flooring needs to be replaced after a flood?
Hardwood and laminate flooring that has been wet for more than 24 hours almost always needs replacement due to warping and swelling. Tile is more water-resistant but the grout and subfloor beneath it may still be damaged. Carpet soaked in floodwater, especially Category 2 or 3 water, should be removed and replaced rather than cleaned.
What is the difference between Category 1, 2, and 3 flood water?
Category 1 is clean water from a broken supply line or rain. Category 2, called gray water, contains some contaminants from sources like washing machine overflow. Category 3, called blackwater, comes from sewage, storm drains, or outdoor flooding and poses serious health risks. The cleanup process and what materials can be salvaged depend heavily on the water category.
How soon should I call a flood restoration company after my home floods?
Call as soon as possible, ideally within the first few hours. Water damage spreads quickly and mold can begin forming within 24 to 48 hours in warm climates like San Antonio. The faster a professional team begins extraction and drying, the lower your total repair costs will be and the better your chances of saving structural materials.
Wrap Up and Next Steps
Knowing what to do after a flood in your home makes a real difference in how fast you recover and how much you spend. Act quickly, document everything, remove water as fast as possible, and get professional help for drying, mold, and repairs.
Complete Flood Restoration is based right here in San Antonio and responds to flood damage emergencies 24 hours a day, 7 days a week. Our IICRC-certified team handles everything from initial water extraction to final repairs, so you work with one trusted company throughout the entire process.
Call Complete Flood Restoration now to schedule an emergency assessment or request a free estimate. The sooner you call, the sooner your home is back to normal.
