Wabash County, Illinois · Mount Carmel
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Pipes freeze in Wabash County on about 22 nights a year, mostly December to February. Older homes, 44% of the stock here, are most at risk.
March brings the most downpours to Wabash County, part of 12.5 heavy-rain days a year. Check the sump first.
44% of homes here predate 1960, when clay and cast iron sewer laterals were standard. Roots and cracks in those lines are a common cause of backups.
Wabash County's wettest day in the 2015–2024 record brought 3.77 inches, and about 67 freeze-thaw days a year mean ice dams in some winters.
22% of occupied homes in Wabash County heat mainly with wood or propane, above the Illinois county median of 16.5%.
Muggy summer nights, lows of 65°F or more, come about 73 times a year in Wabash County. Mold after a leak spreads fastest from June through August.
Local risk profile
Wabash County covers 223 square miles of southeast Illinois, with about 11,119 residents and 5,410 homes. The county seat is Mount Carmel, and Allendale, Bellmont and Keensburg round out the largest towns. Half the homes here were built before 1970, half after.
59/100 Water Damage Risk Index: Elevated Wabash County ranks 23 of 102 Illinois counties. See the statewide ranking and method.The three factors where Wabash County ranks highest compared with other Illinois counties.
Winters here are on the gentler end for Illinois, and pipes still freeze. In the 2015–2024 record the county logged about 22 nights a year at or below 20°F (84th of 102) and 81 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
Cold snaps are the real risk. The worst in the record lasted 14 days below freezing (ending February 2021), and the low bottomed out near -7°F on December 23, 2022.
Expect the hardest freezes in January, inside a season that runs December to February. That's when an outdoor spigot left connected to a hose, or a pipe in a crawl space, is most likely to split.
Freezing nights typically start around Oct 31 and end around Apr 8.
Heavy rain is a bigger factor here than in most of Illinois. About 12.5 days a year bring an inch or more (10th of 102), most often in March, out of 48.6 inches of total precipitation. On September 9, 2018, 3.77 inches fell in a single day. The worst three-day stretch dropped 6.04 inches, ending September 9, 2018, the kind of soaking that overwhelms sump pumps and storm sewers.
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 67 times a year here. They're the main driver of ice dams and of water working its way through foundation cracks in late winter.
Housing
Illinois's 102 counties range widely in housing age; Wabash ranks 46th, with 68% of its homes built before 1980.
In Wabash County 44% of homes are older than 1960. If yours is one of them and the plumbing has never been replaced, expect galvanized steel supply pipe and cast iron drain lines, the two materials most likely to fail quietly.
Manufactured and mobile homes make up 10% of the housing here. Water lines in the underbelly depend on intact skirting and working heat tape, and they're usually the first to freeze in a cold snap.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 73 times a year here, above the Illinois county median of 51. Keep indoor humidity under 60%, as the EPA advises, and dry any leak within 24 to 48 hours; in a humid month a wet basement left alone won't dry by itself.
Mold remediation: what to expectBy main heating fuel, Wabash County homes break down as 55% utility gas, 21% electric, 19% propane and 3% wood. Wood and propane heat are above the Illinois norm. Annual chimney and vent inspection, which the NFPA recommends, is one of the most effective fire-prevention habits for these homes.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Wabash County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Lawrence and Richland get more pipe-freeze nights than Wabash. Lawrence County has the oldest housing nearby, with 72% of homes built before 1980.
By the numbers
| Factor | Wabash | Illinois median | Rank |
|---|---|---|---|
| Homes built before 1960 | 44% | 38% | 38 of 102 |
| Homes built before 1980 | 68% | 66% | 46 of 102 |
| Homes built 2000 or later | 11% | 15% | 75 of 102 |
| Manufactured or mobile homes | 10% | 5.6% | 28 of 102 |
| Vacant homes | 12% | 11% | 34 of 102 |
| Wood or propane heat | 22% | 17% | 30 of 102 |
| Nights at 20°F or colder | 22/yr | 35/yr | 84 of 102 |
| Days with 1 inch+ of rain | 13/yr | 8.4/yr | 10 of 102 |
| Freeze-thaw days | 67/yr | 81/yr | 88 of 102 |
| Muggy nights (65°F+) | 73/yr | 51/yr | 20 of 102 |
Rank 1 is the highest value. Bars run from the lowest to the highest Illinois county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Wabash County: freezing from December to February, heavy rain in March, April and July.
Sources: U.S. Census Bureau, ACS 2024 5-year estimates (2020-2024); weather from NOAA nClimGrid-Daily county averages (EpiNOAA), 2015–2024, averaged across the county; county boundaries from Census TIGER. Reviewed 2026-10-21. Methodology