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Plumbing in Hanover Park: winter lows around 17°F mean exposed pipes can freeze and burst; 84% of homes in Cook County were built before 1980, when galvanized and older pipes were common; flash floods here can back up drains.
In Cook County, July highs average about 84°F and January lows about 17°F, with roughly 38 inches of rain a year. Long, cold winters put furnaces and pipes to the test.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, hailstorms and floods in Cook County, with hail up to 2.75 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in Cook County was built around 1955, about 71 years ago, and 84% were built before 1980. The most common roofs on record are shingle asphalt and tar gravel. Homes that age often need updated wiring, plumbing and roofs.
Cook County has had 11 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Tornadoes, Straight-Line Winds, And Floodng (2024).
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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.
These are Cook County figures — more about homes in Chicago.
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