Harper County, Oklahoma · Buffalo
Water spreading, a burst pipe, sewage, mold or smoke? Call to be connected with a restoration company that serves Buffalo, Laverne and Rosston. Start the steps below while you wait.
Answered 24/7 by a participating local provider. We're a referral service and don't do the work ourselves. How it works
Start here
Pick the closest match. These steps limit the damage and protect your insurance claim. Skip anything that isn't safe.
Pipes freeze in Harper County on about 30 nights a year, mostly November to February. Older homes, 38% of the stock here, are most at risk.
Basements flood here mostly in May. Harper County averages 4.9 days a year with an inch of rain or more.
38% 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.
Harper County's wettest day in the 2015–2024 record brought 2.87 inches, and about 100 freeze-thaw days a year mean ice dams in some winters.
20% of occupied homes in Harper County heat mainly with wood or propane, above the Oklahoma county median of 12.5%.
About 70 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 1,714 homes and around 3,203 residents, Harper County is 1,039 square miles of northern Oklahoma. Buffalo is the county seat; Laverne, Rosston and May are the next largest communities. Half the homes here were built before 1965, half after.
56/100 Water Damage Risk Index: Elevated Harper County ranks 19 of 77 Oklahoma counties. See the statewide ranking and method.The three factors where Harper County ranks highest compared with other Oklahoma counties.
Harper County gets more hard-freeze nights than most of Oklahoma. In the 2015–2024 record the county logged about 30 nights a year at or below 20°F (3rd of 77) and 109 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
The longest cold spell was straight 12 days without the temperature rising above freezing, ending in February 2021. The coldest night reached about -11°F on February 16, 2021. Burst pipes usually show up when a spell like that breaks and the ice thaws.
The freeze season here runs November 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 26 and end around Apr 9.
Harper gets fewer downpours than most Oklahoma counties, but they still fill basements. About 4.9 days a year bring an inch or more (74th of 77), most often in May, out of 24.1 inches of total precipitation. On May 21, 2019, 2.87 inches fell in a single day. The worst three-day stretch dropped 5.4 inches, ending October 10, 2018, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 100 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
79% of homes in Harper County predate 1980, above the Oklahoma county median of 54.8%, which ranks 2nd of Oklahoma's 77 counties.
In Harper County 38% of homes are older than 1960. If yours is one of them and the plumbing has never been replaced, expect galvanized steel supply pipe and cast iron drain lines, the two materials most likely to fail quietly.
11% of homes are manufactured or mobile homes, close to the Oklahoma county median of 12.3%. 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 22% of homes as vacant, above the Oklahoma county median of 17.1%. Empty houses are where a small leak turns into a large claim, because nobody is there to hear it.
Beyond water
About 70 nights a year in Harper County stay at 65°F or warmer, a sign of muggy summer air (73rd of 77 counties). May is the wettest month. Mold grows when indoor humidity stays above about 60%, the EPA's ceiling. A basement dehumidifier set to 50% and drying anything wet within 24 to 48 hours prevents most problems.
Mold remediation: what to expectMain heating fuel in Harper County's occupied homes: 53% utility gas, 26% electric, 18% propane and 2% wood. Propane heat is more common here than in most Oklahoma counties. Heating equipment is one of the leading causes of home fires nationally, and the NFPA recommends having chimneys and vents inspected every year.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Harper County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Beaver gets more pipe-freeze nights than Harper. Its housing is the oldest in the area by share of homes built before 1980.
By the numbers
| Factor | Harper | Oklahoma median | Rank |
|---|---|---|---|
| Homes built before 1960 | 38% | 24% | 13 of 77 |
| Homes built before 1980 | 79% | 55% | 2 of 77 |
| Homes built 2000 or later | 12% | 22% | 64 of 77 |
| Manufactured or mobile homes | 11% | 12% | 49 of 77 |
| Vacant homes | 22% | 17% | 19 of 77 |
| Wood or propane heat | 20% | 13% | 16 of 77 |
| Nights at 20°F or colder | 30/yr | 13/yr | 3 of 77 |
| Days with 1 inch+ of rain | 4.9/yr | 11/yr | 74 of 77 |
| Freeze-thaw days | 100/yr | 65/yr | 4 of 77 |
| Muggy nights (65°F+) | 70/yr | 98/yr | 73 of 77 |
Rank 1 is the highest value. Bars run from the lowest to the highest Oklahoma county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Harper County: freezing from November to February, heavy rain in April, May and June.
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