DeSoto County, Mississippi · Hernando
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With 3% of homes built before 1960 and about 6 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
March brings the most downpours to DeSoto County, part of 15.3 heavy-rain days a year. Check the sump first.
3% 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.
DeSoto County's wettest day in the 2015–2024 record brought 4.93 inches, and about 37 freeze-thaw days a year mean ice dams in some winters.
6% of occupied homes in DeSoto County heat mainly with wood or propane, below the Mississippi county median of 15.1%.
About 114 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 75,437 homes and around 191,301 residents, DeSoto County is 476 square miles of northern Mississippi. Besides Hernando, the county seat, the biggest communities are Southaven, Olive Branch and Horn Lake. Much of its housing is recent, with a median build year of 1999.
34/100 Water Damage Risk Index: Moderate DeSoto County ranks 79 of 82 Mississippi counties. See the statewide ranking and method.The three factors where DeSoto County ranks highest compared with other Mississippi counties.
DeSoto County gets more hard-freeze nights than most of Mississippi. From 2015–2024 it averaged 6 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 41 nights at or below 32°F. That ranks 6th of 82 counties.
Cold snaps are the real risk. The worst in the record lasted 8 days below freezing (ending February 2021), and the low bottomed out near 2°F on December 23, 2022.
The freeze season here runs January, 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 Nov 12 and end around Mar 15.
DeSoto gets fewer downpours than most Mississippi counties, but they still fill basements. The county gets about 58.9 inches of rain and melted snow a year, with 15.3 days of an inch or more (71st of 82). Those downpours cluster in February, March and December, when sump pumps and gutters are tested hardest. The wettest day on record brought 4.93 inches on September 1, 2017. The worst three-day stretch dropped 8.64 inches, ending March 11, 2016, the kind of soaking that overwhelms sump pumps and storm sewers.
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 37 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
Mississippi's 82 counties range widely in housing age; DeSoto ranks 82nd, with 18% of its homes built before 1980.
Since 2000 the county has added enough housing that 47% of homes are that new. Modern PEX and copper rarely fail on their own; the leaks come from connections, appliances and storms.
About 35% of homes went up between 1980 and 1999. Some houses from the late 1970s to the mid-1990s were plumbed with polybutylene, a gray plastic pipe known for failing at fittings. A plumber can tell you in a few minutes whether you have it.
Beyond water
About 114 nights a year in DeSoto County stay at 65°F or warmer, a sign of muggy summer air (62nd of 82 counties). March is the wettest month. 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 DeSoto County it's 55% utility gas, 38% electric, 5% propane and under 1% 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 DeSoto County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
DeSoto gets more pipe-freeze nights than any of its neighbors. Marshall County has the oldest housing nearby, with 30% of homes built before 1980.
By the numbers
| Factor | DeSoto | Mississippi median | Rank |
|---|---|---|---|
| Homes built before 1960 | 3.1% | 15% | 82 of 82 |
| Homes built before 1980 | 18% | 45% | 82 of 82 |
| Homes built 2000 or later | 47% | 23% | 4 of 82 |
| Manufactured or mobile homes | 3.9% | 20% | 82 of 82 |
| Vacant homes | 5.9% | 17% | 81 of 82 |
| Wood or propane heat | 5.7% | 15% | 73 of 82 |
| Nights at 20°F or colder | 6/yr | 3/yr | 6 of 82 |
| Days with 1 inch+ of rain | 15/yr | 16/yr | 71 of 82 |
| Freeze-thaw days | 37/yr | 32/yr | 31 of 82 |
| Muggy nights (65°F+) | 114/yr | 125/yr | 62 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 DeSoto County: freezing from January, heavy rain in February, March 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