Northumberland County, Virginia · Heathsville
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Pipes freeze in Northumberland County on about 9 nights a year, mostly December to February. Older homes, 18% of the stock here, are most at risk.
Basements flood here mostly in June. Northumberland County averages 8.9 days a year with an inch of rain or more.
Sewage backups in Northumberland County spike on heavy-rain days, about 8.9 a year, when sewer mains fill up and water finds the lowest drain.
Northumberland County's wettest day in the 2015–2024 record brought 4.45 inches, and about 66 freeze-thaw days a year mean ice dams in some winters.
8% of occupied homes in Northumberland County heat mainly with wood or propane, below the Virginia county median of 11.9%.
With 86 muggy nights a year, mold in Northumberland County can appear within days of a leak. Dry first, then clean.
Local risk profile
With 9,044 homes and around 12,188 residents, Northumberland County is 191 square miles of eastern Virginia. Heathsville is the county seat. Much of its housing is recent, with a median build year of 1989.
41/100 Water Damage Risk Index: Moderate Northumberland County ranks 77 of 95 Virginia counties. See the statewide ranking and method.The three factors where Northumberland County ranks highest compared with other Virginia counties.
Northumberland County is milder than most of Virginia, but not mild enough to skip winterizing. In the 2015–2024 record the county logged about 9 nights a year at or below 20°F (71st of 95) and 69 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
Cold snaps are the real risk. The worst in the record lasted 4 days below freezing (ending February 2016), and the low bottomed out near 2°F on February 21, 2015.
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.
On average the first fall freeze arrives around Nov 15 and the last spring freeze around Mar 28.
Rainfall is about average for Virginia. Of roughly 46.2 inches of yearly precipitation, the damage comes from the 8.9 days a year with an inch or more, ranked 63rd of 95. June, October and December see the most. The single wettest day in the record: 4.45 inches, October 12, 2018. Multi-day storms matter most for basements; the wettest three days on record here totaled 4.77 inches (through May 19, 2018).
The temperature crosses 32°F in both directions on roughly 66 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
Virginia's 95 counties range widely in housing age; Northumberland ranks 68th, with 35% of its homes built before 1980.
Growth since 2000 added 32% of today's homes. In houses that new, the weak points are washing machine hoses, ice maker lines, water heaters and sump pumps rather than the pipes in the walls.
The 1980s and 1990s account for 33% of the county's homes. If yours is from those decades, look under the sinks and at the water heater for gray plastic pipe stamped PB, which is polybutylene and leak-prone.
Manufactured and mobile homes make up 8% 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.
38% of homes were vacant at survey time. A leak in an empty rental or seasonal house can run for days before anyone notices, which is why those losses tend to be larger.
Beyond water
About 86 nights a year in Northumberland County stay at 65°F or warmer, a sign of muggy summer air (14th of 95 counties). July is the wettest month. 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, Northumberland County homes break down as 4% utility gas, 78% electric, 6% 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 Northumberland County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Northumberland gets more pipe-freeze nights than any of its neighbors. Richmond County has the oldest housing nearby, with 54% of homes built before 1980.
By the numbers
| Factor | Northumberland | Virginia median | Rank |
|---|---|---|---|
| Homes built before 1960 | 18% | 20% | 54 of 95 |
| Homes built before 1980 | 35% | 46% | 68 of 95 |
| Homes built 2000 or later | 32% | 25% | 25 of 95 |
| Manufactured or mobile homes | 8.4% | 9.6% | 57 of 95 |
| Vacant homes | 38% | 15% | 3 of 95 |
| Wood or propane heat | 8.3% | 12% | 68 of 95 |
| Nights at 20°F or colder | 9/yr | 14/yr | 71 of 95 |
| Days with 1 inch+ of rain | 8.9/yr | 10/yr | 63 of 95 |
| Freeze-thaw days | 66/yr | 77/yr | 80 of 95 |
| Muggy nights (65°F+) | 86/yr | 64/yr | 14 of 95 |
Rank 1 is the highest value. Bars run from the lowest to the highest Virginia county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Northumberland County: freezing from December to February, heavy rain in June, October 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