Sevier County, Tennessee · Sevierville
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Pipes freeze in Sevier County on about 10 nights a year, mostly December to February. Older homes, 8% of the stock here, are most at risk.
Basements flood here mostly in February. Sevier County averages 11.6 days a year with an inch of rain or more.
8% 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.
Sevier County's wettest day in the 2015–2024 record brought 3.32 inches, and about 69 freeze-thaw days a year mean ice dams in some winters.
5% of occupied homes in Sevier County heat mainly with wood or propane, below the Tennessee county median of 7.8%.
About 47 nights a year here stay at 65°F or warmer, so basements and crawl spaces can grow mold even without a leak.
Local risk profile
With 58,967 homes and around 99,652 residents, Sevier County is 593 square miles of eastern Tennessee. Sevierville is the county seat; Seymour, Pigeon Forge and Gatlinburg are the next largest communities. Much of its housing is recent, with a median build year of 1995.
18/100 Water Damage Risk Index: Lower Sevier County ranks 94 of 95 Tennessee counties. See the statewide ranking and method.The three factors where Sevier County ranks highest compared with other Tennessee counties.
Pipe-freeze risk in Sevier County sits near the middle of the state. In the 2015–2024 record the county logged about 10 nights a year at or below 20°F (56th of 95) and 74 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
The longest cold spell was straight 6 days without the temperature rising above freezing, ending in February 2015. The coldest night reached about -1°F on February 20, 2015. Burst pipes usually show up when a spell like that breaks and the ice thaws.
The freeze season here runs December to February, with January the coldest. If you travel then, leave the thermostat at 55°F or above and open sink cabinets on outside walls.
Freezing nights typically start around Oct 29 and end around Apr 9.
Sevier gets fewer downpours than most Tennessee counties, but they still fill basements. The county gets about 59 inches of rain and melted snow a year, with 11.6 days of an inch or more (79th of 95). Those downpours cluster in January, February and December, when sump pumps and gutters are tested hardest. The wettest day on record brought 3.32 inches on February 6, 2020. The worst three-day stretch dropped 5.93 inches, ending February 7, 2020, the kind of soaking that overwhelms sump pumps and storm sewers.
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 69 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
26% of homes in Sevier County predate 1980, below the Tennessee county median of 41.2%, which ranks 90th of Tennessee's 95 counties.
41% of homes were built in 2000 or later, more than in most of Tennessee. Newer plumbing rarely corrodes, so damage here tends to come from appliance supply lines, water heaters, sump pumps and storms.
34% date from 1980 to 1999, the window when polybutylene, a gray flexible plastic supply pipe, was used in some homes. It's prone to leaks at the fittings, so it's worth checking for in a house from those years.
11% of homes are manufactured or mobile homes, below the Tennessee county median of 15.9%. Their water lines run under the floor behind the skirting, so a torn skirt or failed heat tape freezes them faster than lines in a site-built house.
The Census counted 32% of homes as vacant, above the Tennessee county median of 11.9%. Empty houses are where a small leak turns into a large claim, because nobody is there to hear it.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 47 times a year here, below the Tennessee county median of 74. 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 expectMain heating fuel in Sevier County's occupied homes: 15% utility gas, 78% electric, 4% propane and 2% wood. Fires here are likelier to start in the kitchen or the wiring than in the furnace. After any fire, keep the HVAC off until ducts are checked, or soot will travel through the house.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Sevier County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Sevier gets more pipe-freeze nights than any of its neighbors. Knox County has the oldest housing nearby, with 43% of homes built before 1980.
By the numbers
| Factor | Sevier | Tennessee median | Rank |
|---|---|---|---|
| Homes built before 1960 | 7.5% | 16% | 89 of 95 |
| Homes built before 1980 | 26% | 41% | 90 of 95 |
| Homes built 2000 or later | 41% | 27% | 8 of 95 |
| Manufactured or mobile homes | 11% | 16% | 62 of 95 |
| Vacant homes | 32% | 12% | 2 of 95 |
| Wood or propane heat | 5.4% | 7.8% | 67 of 95 |
| Nights at 20°F or colder | 10/yr | 11/yr | 56 of 95 |
| Days with 1 inch+ of rain | 12/yr | 14/yr | 79 of 95 |
| Freeze-thaw days | 69/yr | 60/yr | 13 of 95 |
| Muggy nights (65°F+) | 47/yr | 74/yr | 83 of 95 |
Rank 1 is the highest value. Bars run from the lowest to the highest Tennessee county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Sevier County: freezing from December to February, heavy rain in January, February and December.
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