Houston does not get a break from water damage risk. The threats just change with the seasons. Spring brings thunderstorms and bayou flooding. Summer means AC condensate line failures and hurricane season. Fall sees the tail end of tropical weather. And winter, though mild most years, can deliver a freeze event that bursts pipes across the metro. Understanding what is most likely to go wrong and when helps you stay ahead of the damage instead of reacting to it.
January - February: freeze risk and pipe bursts
Houston does not freeze often, but when it does, the results are extreme. The February 2021 winter storm proved that. Temperatures stayed below freezing for over four days straight, something that happens maybe once a decade. Pipes that had never been insulated burst across the city. Supply lines in exterior walls, outdoor hose bibs, pipes in uninsulated attics, and sprinkler system backflow preventers were the most common failures.
Even mild freezes (one or two nights below 32 degrees) can cause problems in Houston homes. Most of the housing stock here was built without the insulation standards you see in northern states. Copper supply lines routed through exterior walls or unheated garage ceilings are especially vulnerable.
What to do: Insulate exposed pipes, especially in the attic and garage. Know where your main water shutoff is. During a freeze warning, open cabinet doors under sinks on exterior walls and let faucets drip. If you are leaving town during winter, do not set your thermostat below 55 degrees.
March - May: spring storms and bayou flooding
Spring is when Houston’s severe weather season ramps up. Supercell thunderstorms can drop 4-6 inches of rain in a few hours, overwhelming storm drains and sending bayous out of their banks. The Tax Day Flood hit in April 2016. The Memorial Day Flood hit in May 2015. This is the window for sudden, intense rainfall that catches people off guard.
Spring storms also bring hail and high winds, which damage roofs. A compromised roof during the rainy season means water intrusion that can go undetected for weeks if the damage is in the attic or behind a soffit.
What to do: Get a roof inspection before spring. Clean gutters and downspouts. Check that your sump pump (if you have one) is working. Verify your flood insurance is current (remember the 30-day waiting period). Stock sandbags if you are in a flood-prone area.
June - August: hurricane season begins, AC failures peak
The Atlantic hurricane season officially starts June 1, but the biggest threat to most Houston homes during the summer months is actually the HVAC system. When your air conditioner runs 16-18 hours a day in Houston’s summer heat, it produces a lot of condensation. That moisture drains through a condensate line, usually into a PVC pipe that exits near the foundation or connects to a plumbing drain.
When that line clogs (from algae, dust, or debris, which is extremely common), water backs up into the drain pan and eventually overflows into your attic, ceiling, or closet. We see more water damage from clogged AC condensate lines during Houston summers than from any other single cause.
Water heater failures also spike in summer. Houston’s hard water accelerates sediment buildup, and tanks that have been operating for 8-12 years often fail during the months when they are working hardest. A 40-gallon water heater failure can put hundreds of gallons of water onto your floor in minutes.
What to do: Flush your AC condensate line monthly with a cup of white vinegar or bleach. Check the drain pan for standing water. Schedule annual HVAC maintenance. If your water heater is over 8 years old, inspect it or consider replacing it before it fails on its own.
Water damage from an AC leak or water heater failure? Call our Houston crew anytime, day or night.
(281) 326-6554September - November: peak hurricane season
September is historically the most active month for Atlantic hurricanes, and Houston sits in one of the most exposed corridors on the Gulf Coast. Hurricane Harvey made landfall in late August 2017. Tropical Storm Imelda hit in September 2019. Hurricane Ike struck in September 2008.
The primary water damage threats during hurricane season are storm surge (for homes in southeast Harris County, Galveston County, and coastal areas), inland flooding from stalled tropical systems (Harvey dropped rain for four straight days), and wind-driven rain intrusion through damaged roofs, soffits, and windows.
What to do: If you are in a surge zone, have an evacuation plan. For everyone else, prep your home following our flood preparation guide. Secure or store outdoor items that can become projectiles. Pre-position important documents and valuables on upper floors.
December: holiday absences and slow leaks
December brings a different kind of water damage risk: vacancy. Many Houston homeowners travel during the holidays, leaving homes unattended for a week or more. A slow leak under a sink, a supply line failure on a toilet, or a water heater giving out while you are gone can mean days of unchecked water damage.
We respond to a noticeable spike in calls the week after Christmas and New Year’s from homeowners returning to find water damage that has been sitting for days. By that point, mold has often already started.
What to do: Before leaving for the holidays, check under every sink, inspect the water heater, and consider shutting off the main water supply if you will be gone more than a few days. Install smart water leak sensors that alert your phone. Ask a neighbor to check on the house.
Year-round: the constant risks
Some water damage sources do not follow a seasonal pattern:
- Washing machine hose failures: Rubber supply hoses degrade over time and can burst at any point. Replace them with braided stainless steel lines every 5 years.
- Toilet supply line failures: The plastic supply lines that connect toilets to the wall valve are a common failure point. Replace with braided stainless steel.
- Slab leaks: Houston’s Beaumont Clay soils shift with moisture levels, stressing copper supply lines under the slab. Slab leaks can happen in any month.
- Dishwasher and refrigerator line leaks: These are often slow leaks that damage flooring and cabinetry for weeks before anyone notices.
The common thread here is that most water damage is preventable with regular inspection and maintenance. Checking supply lines, flushing the AC condensate line, and inspecting around the water heater once a month takes 15 minutes and can save you from a $10,000 restoration job.