Andrew County, Missouri · Savannah
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With 25% of homes built before 1960 and about 43 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
July brings the most downpours to Andrew County, part of 9.2 heavy-rain days a year. Check the sump first.
Sewage backups in Andrew County spike on heavy-rain days, about 9.2 a year, when sewer mains fill up and water finds the lowest drain.
Andrew County's wettest day in the 2015–2024 record brought 4.71 inches, and about 88 freeze-thaw days a year mean ice dams in some winters.
17% of occupied homes in Andrew County heat mainly with wood or propane, below the Missouri county median of 24.5%.
With 54 muggy nights a year, mold in Andrew County can appear within days of a leak. Dry first, then clean.
Local risk profile
Andrew County covers 433 square miles of northwest Missouri, with about 18,065 residents and 7,558 homes. Besides Savannah, the county seat, the biggest communities are Country Club, Fillmore and Amazonia. The county's median home was built in 1980.
51/100 Water Damage Risk Index: Elevated Andrew County ranks 55 of 114 Missouri counties. See the statewide ranking and method.The three factors where Andrew County ranks highest compared with other Missouri counties.
Andrew is on the colder side of Missouri for pipes. From 2015–2024 it averaged 43 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 114 nights at or below 32°F. That ranks 16th of 114 counties.
On February 16, 2021 the low fell to about -19°F, and in the stretch ending January 2018 the county went 15 days in a row below freezing. Leaks from split pipes typically appear the day the thaw arrives.
Expect the hardest freezes in January, inside a season that runs November to March. That's when an outdoor spigot left connected to a hose, or a pipe in a crawl space, is most likely to split.
On average the first fall freeze arrives around Oct 23 and the last spring freeze around Apr 13.
Rainfall is about average for Missouri. About 9.2 days a year bring an inch or more (76th of 114), most often in July, out of 37.5 inches of total precipitation. On June 25, 2021, 4.71 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 5.93 inches (through June 26, 2021).
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 88 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
51% of homes in Andrew County predate 1980, close to the Missouri county median of 53%, which ranks 64th of Missouri's 114 counties.
Housing age is mixed: 25% of homes are pre-1960 and 20% are 2000 or newer. Ask any plumber which era your house is from and you'll know which failures to watch for.
The 1980s and 1990s account for 30% 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.
Beyond water
About 54 nights a year in Andrew County stay at 65°F or warmer, a sign of muggy summer air (88th of 114 counties). May 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 Andrew County it's 32% utility gas, 45% electric, 14% propane and 3% wood. Heating equipment, cooking and electrical failures cause most home fires nationally. Even a small kitchen fire can leave soot through the whole house, because smoke follows air currents into closets, ducts and attic space.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Andrew County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
DeKalb, Gentry, Holt and Nodaway get more pipe-freeze nights than Andrew. Holt County has the oldest housing nearby, with 72% of homes built before 1980.
By the numbers
| Factor | Andrew | Missouri median | Rank |
|---|---|---|---|
| Homes built before 1960 | 25% | 25% | 64 of 114 |
| Homes built before 1980 | 51% | 53% | 64 of 114 |
| Homes built 2000 or later | 20% | 21% | 68 of 114 |
| Manufactured or mobile homes | 6.7% | 9.8% | 86 of 114 |
| Vacant homes | 7.5% | 15% | 100 of 114 |
| Wood or propane heat | 17% | 25% | 79 of 114 |
| Nights at 20°F or colder | 43/yr | 28/yr | 16 of 114 |
| Days with 1 inch+ of rain | 9.2/yr | 10/yr | 76 of 114 |
| Freeze-thaw days | 88/yr | 77/yr | 8 of 114 |
| Muggy nights (65°F+) | 54/yr | 65/yr | 88 of 114 |
Rank 1 is the highest value. Bars run from the lowest to the highest Missouri county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Andrew County: freezing from November to March, heavy rain in May, July and August.
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