Houston Hurricane Season Flood Preparation: The Complete 2024 Home Checklist
Houston Hurricane Season Flood Preparation: The Complete Home Checklist
Houston has experienced five 500-year flood events in less than a decade. The question for Houston homeowners isn’t whether they’ll face a major storm — it’s whether they’ll be ready when it comes. This guide covers every preparation step, from structural hardening to insurance documentation, with Houston-specific resources and contacts that generic preparation guides never include.
Start Here: Know Your Risk Profile
Check Your FEMA Flood Zone
Visit msc.fema.gov and enter your address. Your flood zone designation determines your mandatory insurance requirements and informs your preparation intensity. But remember Harvey’s lesson: Zone X (low-risk) properties flooded catastrophically when the Army Corps released Addicks and Barker Reservoirs.
Know Your Harris County Evacuation Zone
Harris County uses zones A through F for evacuation orders:
- Zone A: Highest risk — storm surge areas, lowest elevations. Evacuate first when ordered.
- Zone B: High risk — flood-prone areas near bayous and waterways.
- Zone C: Moderate risk — low-lying areas that could flood in major events.
- Zones D-F: Lower risk — typically shelter in place unless Category 3+.
Find your zone at ReadyHarris.org or call 713-881-3100. Pre-register your household (especially if you have special needs) in the Harris County Special Needs Registry.
Know Your Bayou
Houston’s bayou system — Brays, Buffalo, White Oak, Greens, Hunting, Sims, and others — is your most important real-time flood indicator. Learn which bayou is closest to your home and monitor it at harriscountyfws.org. Each gauge shows current levels, flood stage thresholds, and historical peaks.
Structural Preparation: Hardening Your Home
Roof System
- Hurricane straps/clips: If your home was built before 1995, it likely lacks proper roof-to-wall connections. Metal hurricane straps on rafters/trusses reduce roof loss dramatically. Cost: $2,000-$5,000 installed.
- Roof decking: H-clips between sheathing panels and ring-shank nails resist uplift better than smooth nails.
- Seal penetrations: Inspect and re-caulk all roof penetrations (vents, pipes, HVAC). These are common entry points for wind-driven rain.
- Gutters and downspouts: Clean twice a year. Clogged gutters contribute to fascia rot and water intrusion at the roofline.
Garage Door
The garage door is the largest opening in most Houston homes and the most common point of failure in high winds. A failed garage door allows wind pressure to build inside the structure, causing roof failure. Options:
- Bracing kit: $50-$150 for a temporary brace kit for existing doors (for storms only, remove after)
- Wind-rated replacement door: $800-$2,500 for a door rated to 130+ mph wind speeds
- Vertical brace: Some doors can be retrofitted with vertical bracing
Windows and Doors
- Storm shutters: Most cost-effective long-term protection — accordion shutters allow quick deployment
- Plywood: Pre-cut and pre-drill 5/8″ plywood panels for all windows before season; label them by window
- Impact-resistant glass: Most expensive but requires no deployment; protects year-round
Flood Protection: Keeping Water Out
Sewer Backflow Prevention
During major storms, Houston’s overwhelmed sewer system can backflow into homes through floor drains, toilets, and showers — this happened extensively in Harvey. A backwater valve (check valve) installed on your main sewer line prevents sewage from flowing back into your home. Cost: $800-$2,000 installed by a licensed plumber. This single investment can prevent tens of thousands of dollars in Category 3 sewage damage.
Sump Pump with Battery Backup
If you have a sump pump, ensure it has a battery backup or water-powered backup system. Power outages during storms render electric-only sump pumps useless — precisely when you need them most. A battery backup unit runs for 10,000-15,000 gallons on a single charge.
Flood Barriers
For homes that have flooded before or are near bayous:
- Sandbags: Harris County distributes free sandbags before major storms at multiple locations — follow @ReadyHarris on social media for distribution sites. Requires labor to place.
- Water-filled barriers (AquaDam/Flood Control): Inflatable or water-filled tubes that create temporary berms. More effective per hour of setup time than sandbags for large areas.
- Door flood shields: Removable aluminum barriers that install in door frames to seal against 18-30″ of water. Cost: $300-$1,500 per door.
Elevate Critical Systems
Water heaters, electrical panels, and HVAC equipment on slabs should be elevated or flood-proofed if your home has flooded before. FEMA provides grants through the Hazard Mitigation Grant Program (HMGP) for these improvements after declared disasters. Contact Harris County Emergency Management at 713-881-3100 about available mitigation assistance.
Emergency Supplies: The Houston-Specific List
Standard emergency lists exist everywhere. This is the Houston version — based on what people actually needed in Harvey:
Water and Food
- 1 gallon of water per person per day for 7-10 days (not just 3)
- Manual can opener
- Food requiring no cooking or refrigeration (Harvey power outages lasted 2-3 weeks for some areas)
- Baby formula, pet food, and medication for 10+ days
Power and Communication
- Portable power station (1,000Wh+ for medical devices, phone charging, small fan)
- Battery-powered or hand-crank weather radio (NOAA) — when cell towers fail
- Solar phone charger
- Satellite communicator (Garmin inReach) if you’re in high-risk areas
Flood-Specific Supplies
- Rubber boots (knee-high minimum) — floodwater in Houston bayous is Category 3 contaminated
- Waterproof bags for electronics and documents
- Rope for tying items that float
- Life jackets for each household member (Harvey saw many rescues from flooded cars)
Documents (In Waterproof Container)
- Insurance policies (homeowners AND flood)
- Property deed/mortgage documents
- Photo IDs, Social Security cards, passports
- Vehicle titles
- Medical records and prescription list
- Recent photo inventory of your home contents
Houston Emergency Contacts: Save These Now
- Harris County Emergency: 713-881-3100
- Houston Emergency Management: 713-884-4500
- CenterPoint Energy (gas emergencies): 713-659-2111
- CenterPoint Energy (power outages): 713-207-2222
- City of Houston Public Works: 311
- Harris County Flood Warning System: harriscountyfws.org
- Hurricane Evacuation Routes: txdot.gov/hurricane
- Nearest Shelter (during storm): readyharris.org/shelters
- 247 Restoration Specialists (24/7 emergency): (281) 262-9500
Insurance: The Preparation Step Most People Skip
The single highest-ROI preparation step costs nothing and takes 30 minutes: conduct a complete video home inventory and verify your insurance coverage. Walk through every room with your phone, opening cabinets and closets, narrating what you own. Store the video in cloud backup outside your home. Then:
- Confirm you have a flood insurance policy (separate from homeowners insurance)
- Verify your homeowners policy covers wind damage and hurricane deductibles
- Know your hurricane deductible — many Texas policies have a separate, higher hurricane deductible that triggers at named storms
- Check your mold coverage sublimit
- Confirm your temporary housing (ALE) limit
Call your insurance agent before June 1 to review coverage. The 30-day NFIP waiting period means you cannot buy flood insurance after a storm is named.
Frequently Asked Questions
When does Houston hurricane season start and end?
The Atlantic hurricane season officially runs June 1 through November 30. Houston’s peak risk period is August through October, when Gulf water temperatures are warmest and peak storm activity occurs. The most active period historically is mid-August through mid-October.
How do I monitor flood levels in my Houston neighborhood?
Use the Harris County Flood Warning System at harriscountyfws.org — it provides real-time gauge readings on all major bayous. The Houston Emergency Alert System (www.readyharris.org) sends alerts for your specific area. Follow @HarrisCoFlood on Twitter/X for real-time updates. The HCFCD (Harris County Flood Control District) app provides live flooding maps.
Should I evacuate or shelter in place during a Houston hurricane?
If you’re in Harris County evacuation zones A or B, or in a high-risk flood zone (Zone AE), evacuate when ordered. If you’re in zones C-F with a structurally sound home that’s not in a flood zone, sheltering in place may be appropriate for Category 1-2 storms. For Category 3+, take mandatory evacuation orders seriously — Galveston’s 1900 hurricane killed 6,000-12,000 people who didn’t leave.
What is the biggest mistake Houston homeowners make before a hurricane?
The biggest mistake is waiting too long to prepare. Lumber, generators, sandbags, and water sell out days before a major storm hits Houston. Prepare your home and supplies at the START of hurricane season (June 1), not when a storm is named. Also: not having flood insurance. Over 80% of flooded Harris County homes in Harvey had no flood coverage.
After the Storm: What to Do First
If your home flooded, the 60-minute window after water recedes determines mold prevention and insurance documentation success. Do not re-enter a flooded home until gas is verified off and structural integrity is confirmed. When you do enter:
- Photograph everything before touching anything
- Do not turn on electrical systems if water reached outlets
- Begin water extraction within 24 hours to prevent mold (starts growing at 24-48 hours in Houston’s humidity)
- Call a restoration professional — Harris County and Houston flooding is Category 2-3 due to bayou contamination
247 Restoration Specialists deploys 24/7 throughout the greater Houston area. After major storm events, we prioritize response order based on damage severity. Call (281) 262-9500 to get on our dispatch list immediately after a storm passes.
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