When Houston freezes, be the prepared one.
We only get a few hard-freeze nights a year — but our homes aren’t built for them, and 2021 proved how fast a freeze turns into burst pipes and days without power. A short checklist, done ahead of time, is the whole game.
Houston doesn’t do winter often, and that’s exactly the problem. Northern homes are built to shrug off a hard freeze; ours aren’t. Pipes run through uninsulated attics and exterior walls, outdoor plumbing sits exposed, and — as Winter Storm Uri made unforgettable in February 2021 — the grid itself can buckle. The freezes are rare, but the damage when you’re caught unprepared is severe and expensive. The fix is almost entirely about doing a few simple things before the temperature drops.
Why a freeze hits Houston homes hard
Two reasons. First, our plumbing isn’t insulated for sustained cold — water lines through the attic, garage, and exterior walls are the first to freeze, and a frozen pipe doesn’t just block water, it can burst and flood the house when it thaws. Second, extended freezes can take the power with them, which means no heat exactly when you need it most. Both are manageable if you’ve prepped; both are disasters if you haven’t.
Before the freeze: protect your pipes
When a hard freeze is in the forecast, run this list:
- Drip your faucets. Let both hot and cold drip slowly, especially on exterior walls and the fixtures farthest from where water enters. Moving water resists freezing, and an open faucet relieves the pressure that actually bursts pipes.
- Open cabinet doors under sinks on exterior walls so household heat reaches the pipes.
- Disconnect and drain garden hoses, then cover each outdoor faucet with an insulated faucet cover (a few dollars each at any hardware store).
- Insulate exposed pipes in the attic, garage, and along exterior walls with foam sleeves.
- Know where your main water shutoff is — and that it works — before the freeze. If a pipe bursts, shutting off fast is the difference between a puddle and a flooded house.
- Keep the garage door closed and the thermostat steady; don’t let the house get too cold overnight.
Irrigation, outdoor systems, and the pool
The parts of your water system that live outside are the most vulnerable. Shut off the water to your in-ground irrigation and insulate the exposed backflow preventer — it’s the piece that cracks first and it’s expensive to replace. If you have a pool, the rule is the opposite of “shut it down”: keep the pump running continuously so the water keeps moving and doesn’t freeze in the equipment. I cover that in detail in the Houston pool maintenance guide.
When the power goes out
This is the 2021 lesson Houston won’t forget. If the power fails during a freeze:
- Keep faucets dripping — without heat, frozen pipes become even more likely, and circulation still helps.
- Conserve heat — close off unused rooms, block drafts, and layer up; never use a grill, generator, or stove indoors for heat (carbon monoxide kills).
- Protect what you can — fill bathtubs for non-drinking water before pressure drops, and know your shutoff in case a pipe lets go.
- Have a backup plan. After Uri, many Houston homeowners added a standby generator so a multi-day outage is an inconvenience, not an emergency.
After it thaws
As things warm up, watch for leaks — a pipe can crack in the freeze and only reveal it when water flows again. Check under sinks, in the attic and garage, and listen for running water when everything’s off. Catching a slow leak early saves you the ceiling. If you do find a burst, you’ll be glad you already knew where that shutoff was.
Freeze prep is one piece of the seasonal rhythm here — the rest is in the Houston home maintenance checklist.
New to Houston winters?
First freeze in your new home coming up?
If you moved from a warmer place — or somewhere that actually handles cold — Houston freezes catch people off guard. I’m glad to help you get ready, or talk through any home question. No pressure:
Frequently asked questions
Should I drip my faucets during a Houston freeze?
Yes — when it’ll be at or below freezing for hours, let hot and cold drip slowly, especially on exterior walls and the fixtures farthest from the water’s entry point. Moving water resists freezing and an open faucet relieves the pressure that bursts pipes. Open under-sink cabinets on exterior walls too.
How do I protect outdoor faucets and sprinklers in a freeze?
Disconnect and drain hoses, cover each outdoor faucet with an insulated cover, shut off the water to in-ground irrigation, and insulate the exposed backflow preventer. If you have a pool, keep the pump running through the freeze.
What did the 2021 Texas freeze teach Houston homeowners?
That our homes aren’t built for prolonged hard freezes — pipes run through uninsulated attics and walls, and the grid can fail. Know your main water shutoff before you need it, protect pipes and outdoor plumbing proactively, and have a plan for an extended outage. Many homeowners added backup power afterward.
Homeowner · Greater Houston
New to Houston and bracing for your first real freeze?
A little prep goes a long way here. I’m glad to help you get your home ready — or answer any question about owning in this market. No pressure, just a local who’s been through a few of these.
