Your Houston home just flooded. The next 60 minutes are the most critical of your entire recovery. Every minute you delay, water is migrating deeper into your walls, under your floors, and into structural cavities where Houston’s 75% average humidity will turn it into a mold colony within 24 hours. This guide tells you exactly what to do, in what order, and why — based on the IICRC S500 Standard for Professional Water Damage Restoration and the specific conditions that make Houston flooding unlike anywhere else in the country.

Bottom line: Cut power. Document everything. Call your insurer. Call a licensed restoration company. Do not use consumer fans or shop vacs. Do not wait until tomorrow.

Why the First 60 Minutes After a Houston Flood Are Different

Houston flooding is not the same as flooding in Dallas, Atlanta, or Chicago. Three factors make the Houston response window uniquely compressed: the city’s 75-90% ambient relative humidity, the contamination level of bayou floodwater, and the clay-heavy soil that traps moisture under slabs and against foundation walls for weeks after surface water recedes.

Houston receives an average of 49.77 inches of rain annually — roughly double the U.S. national average of 30 inches — and sits at an average elevation of only 43 feet above sea level. The city’s 2,500+ miles of bayous and drainage channels drain directly into Galveston Bay. When those bayous overflow, they carry decades of accumulated industrial runoff, agricultural chemicals, and raw sewage into residential neighborhoods.

According to the IICRC S500 Standard for Professional Water Damage Restoration (5th Edition, 2021), water is classified into three categories based on contamination level. Category 1 (clean water from a supply line), Category 2 (gray water with biological contaminants), and Category 3 (black water — the most dangerous). Houston bayou overflow is universally Category 3. Rain water that has contacted soil and traveled through storm drains is Category 2 at minimum. Only water from a clean supply line break inside your home starts as Category 1 — and even that degrades to Category 2 within 24-72 hours if not extracted.

This classification matters because it determines whether you can safely enter your home, what protective equipment is required, and what restoration protocols apply. A Category 3 flood event requires licensed professionals with appropriate PPE — not a homeowner with a mop and a fan.

Minutes 0-10: Life Safety First

Before you take any other action: do not enter flooded areas until you confirm electrical safety. Water and electricity in the same space can be lethal. Turn off your main circuit breaker from a dry location before entering any flooded room.

If your breaker panel is in the flooded area and you cannot reach it safely, do not enter your home. Call CenterPoint Energy (Houston’s electric utility) at 713-207-2222 to request emergency power shutoff. They handle this regularly for Houston flood events and respond as a priority call.

Once power is confirmed off:

• Do not enter water deeper than 2 inches without rubber boots and waterproof gloves if the water source is unknown
• If you smell gas, leave immediately and call CenterPoint Gas at 713-659-2111 before re-entering
• If floodwater has reached HVAC equipment, your water heater, or electrical panels, do not attempt to operate any of these until they are inspected by a licensed technician
• Children and pets should remain out of the flooded area entirely until it is professionally assessed

If you are in the Energy Corridor, Meyerland, Kingwood, or any neighborhood near a bayou and water is still rising — evacuate first. Recovery can wait. Your safety cannot.

Minutes 10-20: Identify Your Water Source and Category

The source of the water determines the danger level, the required response, and what your insurance will cover. You need to identify the source before touching anything.

Is this internal water damage or external flooding?

Internal sources (covered by standard homeowners insurance):

• Burst or leaking pipe
• Water heater failure
• AC condensate pan overflow or drain line clog
• Appliance failure (washing machine, dishwasher, refrigerator ice maker)
• Roof leak where rain entered through a damaged roof

External flooding (requires separate flood insurance — NOT covered by standard homeowners):

• Bayou overflow entering through doors, foundation, or grade
• Street flooding backed up through foundation vents or under doors
• Storm surge (rare in Houston proper; relevant for Galveston, League City, Kemah)
• Addicks or Barker Reservoir controlled releases (affects Katy, Memorial, Energy Corridor)

This distinction is critical for your insurance claim. If water came in from outside, your standard homeowners policy will deny the claim — you need your flood policy. If you do not have a flood policy and bayou water entered your home, contact Harris County Flood Control District at 713-684-4000 immediately — they maintain resources for uninsured flood victims and can direct you to FEMA Individual Assistance programs.

Houston-specific note: During major storm events, it is common for a home to experience BOTH internal damage (a pipe joint fails under pressure surge) AND external flooding simultaneously. Document both separately for separate claims.

Minutes 20-35: Document Everything Before Touching Anything

Insurance adjusters in Houston are overwhelmed after major flood events. They may not reach your property for days or even weeks. The documentation you create in the next 15 minutes is your claim. Destroy or move anything without documenting it first, and you may lose your right to reimbursement for that item.

Use your smartphone. Shoot video first — a continuous walkthrough of every affected room, narrating what you see: water level marks on walls, wet flooring, damaged furniture, visible structural damage. Then take still photos of:

• All four walls of every affected room with a ruler or reference object showing water height
• Every damaged appliance, piece of furniture, and personal property item
• The exterior of the home showing water lines on the foundation or siding
• Any visible source of the water intrusion (broken pipe, failed sump pump, flooded door threshold)
• Serial numbers on damaged appliances before they are moved
• Contents of cabinets and closets affected by water

Upload everything to cloud storage immediately — Google Photos, iCloud, or Dropbox. Do not rely solely on your phone in a flood scenario. If your phone dies or is damaged, your documentation is gone.

Create a written inventory list even if rough. Item, location, estimated age. You will refine this later with your adjuster, but having a starting list demonstrates due diligence and supports your claim.

Texas Insurance Code, Section 542.055 requires your insurer to acknowledge your claim within 15 calendar days and accept or deny within 15 business days after receiving all required documentation. The clock starts when you report — so call while you document.

Minutes 35-45: Call Your Insurance Company and Open a Claim

Call your insurance company now — not after you’ve cleaned up, not after you’ve assessed the full damage, and not tomorrow. Open the claim while the water is still visible. Insurers in Texas are required under the Texas Prompt Payment Act to acknowledge claims within 15 days, but adjusters triage by claim date, not by severity.

When you call, have the following ready:

• Your policy number
• The date and approximate time flooding began
• The source of water if known (pipe burst, storm flooding, appliance failure)
• A brief description of affected rooms and visible damage
• Your contact information and alternate location if you’ve evacuated

Ask the agent specifically: “Is my policy a replacement cost value or actual cash value policy?” This determines whether you receive the full cost of replacing damaged items or their depreciated value. It is a question that will affect your settlement by thousands of dollars.

Ask also: “Do I have loss of use coverage?” If your home is uninhabitable, this covers hotel and living expenses while restoration proceeds.

If you have separate flood insurance through the National Flood Insurance Program (NFIP), call your NFIP carrier separately. NFIP claims are processed independently of your homeowners policy.

Minutes 45-60: Call a Licensed Houston Water Restoration Company

Professional water extraction and structural drying must begin within 24 hours in Houston’s climate — ideally the same day. Waiting until morning, or waiting for your insurance adjuster before starting mitigation, is the single most expensive mistake Houston homeowners make after a flood.

Your insurance policy requires you to take reasonable steps to mitigate further damage. Waiting is not reasonable. Waiting in Houston’s humidity guarantees mold growth in structural cavities within 24-48 hours — and mold remediation costs 3-5x more than water damage mitigation that prevents it.

What to expect from a professional water damage response:

• Moisture mapping: Industrial-grade moisture meters and thermal imaging cameras map water migration in walls, subfloor, and ceiling cavities — areas invisible to the eye
• Category assessment: Certified technicians determine water classification (1, 2, or 3) and establish appropriate containment and PPE protocols
• Extraction: Truck-mounted extraction units remove standing water at 100x the rate of consumer shop vacs
• Structural drying: Industrial LGR dehumidifiers and high-velocity air movers create controlled drying conditions. In Houston’s humidity, consumer fans are ineffective — they circulate moist air rather than removing moisture from structural materials
• Psychrometric monitoring: Daily readings of temperature, relative humidity, and specific humidity confirm drying progress and protect against over-drying (which causes its own structural damage)
• Documentation for insurance: IICRC-certified restoration companies provide moisture logs, drying records, and damage documentation that insurance adjusters accept as professional evidence

When calling, ask: “Are your technicians IICRC Water Restoration Technician (WRT) certified?” The IICRC (Institute of Inspection, Cleaning and Restoration Certification) sets the industry standard. Certification is not optional — it is the baseline for professional water damage work.

Ask also: “Will you work directly with my insurance company?” Reputable restoration companies in Houston handle insurance coordination routinely. They document their work to adjuster standards, submit XACTIMATE estimates (the industry-standard estimating software), and communicate directly with your claims adjuster — significantly reducing your administrative burden during an already stressful event.

What Not to Do in the First 60 Minutes

As important as the action steps above are the things you must not do — each of these common mistakes compounds damage and can compromise your insurance claim:

• Do not use consumer fans or shop vacs. Fans circulate moist air and drive moisture deeper into structural materials. Shop vacs cannot extract water from wall cavities, subfloor, or insulation. Using them creates a false sense of progress while hidden moisture enables mold growth.
• Do not enter water without knowing the electrical status. This is lethal.
• Do not dispose of any damaged items before documenting them. Throwing out waterlogged carpet, furniture, or personal property before your adjuster sees it — or before you photograph it — forfeits your right to claim those items.
• Do not assume bayou water is safe because it “looks clear.” Houston bayou overflow carries E. coli, Vibrio, heavy metals, and petrochemicals regardless of visual appearance. Category 3 water requires professional PPE and decontamination protocols.
• Do not wait for the insurance adjuster before beginning mitigation. Texas insurance policies require reasonable mitigation. Waiting for adjuster approval before starting is explicitly not required — and waiting typically extends your claim timeline and increases total damage costs.
• Do not use bleach on mold. If you see mold growth beginning (fuzzy discoloration, musty odor), do not apply bleach. Bleach does not penetrate porous materials where mold roots grow, kills only surface growth, and can create toxic fumes when mixed with other cleaning agents. Professional mold remediation follows EPA guidelines and IICRC S520 protocols.

Houston-Specific Resources

Keep these numbers accessible after any flooding event in the Houston metro:

• CenterPoint Energy (electrical emergency): 713-207-2222
• CenterPoint Energy (gas emergency): 713-659-2111
• Harris County Flood Control District: 713-684-4000
• City of Houston Public Works (flooding/drainage): 311
• Texas Department of Insurance (claims disputes): 800-252-3439
• FEMA Individual Assistance (disaster declaration zones): 800-621-3362
• Texas 211 (disaster recovery resources): 211

The 60-Minute Checklist: Quick Reference

• ☑ 0-10 min: Shut off main circuit breaker. Confirm gas safety. Evacuate if water is still rising.
• ☑ 10-20 min: Identify water source. Determine if internal (homeowners) or external flood (flood policy).
• ☑ 20-35 min: Document all damage with video and photos. Upload to cloud immediately.
• ☑ 35-45 min: Call insurance company. Open claim. Ask about replacement cost vs ACV, loss of use.
• ☑ 45-60 min: Call a licensed, IICRC-certified Houston water restoration company. Request same-day response.
• ☑ Ongoing: Do not use fans, shop vacs, or bleach. Do not dispose of damaged property before documentation.