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Plumbing in St. Louis: winter lows around 23°F mean exposed pipes can freeze and burst; 93% of homes in St. Louis city were built before 1980, when galvanized and older pipes were common; flash floods here can back up drains.
In St. Louis city, July highs average about 88°F and January lows about 23°F, with roughly 42 inches of rain a year.
Over the last 10 years the National Weather Service recorded hailstorms, damaging thunderstorm winds and flash floods in St. Louis city, with hail up to 2 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in St. Louis city was built around 1923, about 103 years ago, and 93% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
St. Louis city has had 19 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Straight-Line Winds, Tornadoes, And Flooding (2025).
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Insulate pipes in crawl spaces and outside walls, drip faucets on the coldest nights, and know where your main shut-off is.
Galvanized steel and polybutylene pipes are past their life in most homes — low pressure, rusty water or repeated leaks are the signs.
Yes if water is spreading or near electrics — turn off the main and choose Emergency when you book; we call you at the first opening.
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