Walthall County, Mississippi · Tylertown
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Pipes freeze in Walthall County on about 2 nights a year, mostly midwinter. Older homes, 14% of the stock here, are most at risk.
Basements flood here mostly in January. Walthall County averages 17.9 days a year with an inch of rain or more.
Sewage backups in Walthall County spike on heavy-rain days, about 17.9 a year, when sewer mains fill up and water finds the lowest drain.
Walthall County's wettest day in the 2015–2024 record brought 10.63 inches, and about 22 freeze-thaw days a year mean ice dams in some winters.
26% of occupied homes in Walthall County heat mainly with wood or propane, above the Mississippi county median of 15.1%.
About 141 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 6,917 homes and around 13,839 residents, Walthall County is 404 square miles of southern Mississippi. Tylertown is the county seat. The county's median home was built in 1982.
56/100 Water Damage Risk Index: Elevated Walthall County ranks 28 of 82 Mississippi counties. See the statewide ranking and method.The three factors where Walthall County ranks highest compared with other Mississippi counties.
For frozen pipes, Walthall County is a typical Mississippi county, which is still plenty. In the 2015–2024 record the county logged about 2 nights a year at or below 20°F (47th of 82) and 22 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
With only about 22 freezing nights a year, many homes here aren't built for cold, so a single arctic outbreak can burst pipes across the county. The record low in this data was about 12°F, on January 17, 2018.
Heavy rain is a bigger factor here than in most of Mississippi. About 17.9 days a year bring an inch or more (14th of 82), most often in January, out of 66.5 inches of total precipitation. On March 11, 2016, 10.63 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 11.87 inches (through March 13, 2016).
The temperature crosses 32°F in both directions on roughly 22 days a year. Each cycle melts and refreezes water at roof edges and in foundation cracks, which is how ice dams and basement seepage get started.
Housing
47% of homes in Walthall County predate 1980, close to the Mississippi county median of 45.1%, which ranks 35th of Mississippi's 82 counties.
The mix runs from 14% built before 1960 to 21% built since 2000, so older neighborhoods bring aging pipe while newer subdivisions bring failed appliance lines and water heaters.
32% 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.
28% of homes are manufactured or mobile homes, above the Mississippi county median of 20%. 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.
With 24% of homes empty at survey time, landlords and seasonal owners should shut off the main or schedule checks in winter. An unheated vacant house is also where many policies limit freeze coverage.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 141 times a year here, above the Mississippi county median of 125. The EPA recommends keeping indoor humidity below 60%, ideally 30 to 50%. Basements can pass 60% on their own in summer, so a dehumidifier matters even without a leak, and anything wet should be dried within 24 to 48 hours.
Mold remediation: what to expectHeating fuel matters for fire risk. In Walthall County it's 6% utility gas, 68% electric, 22% propane and 4% wood. Wood and propane heat are more common here than the state median. Have chimneys swept and fuel-burning appliances serviced each fall, and keep three feet clear around stoves and space heaters.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Walthall County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Walthall gets more pipe-freeze nights than any of its neighbors. It also has the most heavy-rain days in its area. Marion County has the oldest housing nearby, with 49% of homes built before 1980.
By the numbers
| Factor | Walthall | Mississippi median | Rank |
|---|---|---|---|
| Homes built before 1960 | 14% | 15% | 48 of 82 |
| Homes built before 1980 | 47% | 45% | 35 of 82 |
| Homes built 2000 or later | 21% | 23% | 51 of 82 |
| Manufactured or mobile homes | 28% | 20% | 17 of 82 |
| Vacant homes | 24% | 17% | 9 of 82 |
| Wood or propane heat | 26% | 15% | 15 of 82 |
| Nights at 20°F or colder | 2/yr | 3/yr | 47 of 82 |
| Days with 1 inch+ of rain | 18/yr | 16/yr | 14 of 82 |
| Freeze-thaw days | 22/yr | 32/yr | 68 of 82 |
| Muggy nights (65°F+) | 141/yr | 125/yr | 6 of 82 |
Rank 1 is the highest value. Bars run from the lowest to the highest Mississippi county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Walthall County: freezing from midwinter, heavy rain in January, April and May.
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