Lucas County, Ohio · Toledo
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Lucas County averages 29 nights a year at 20°F or colder, mostly December to March, and 47% of its homes predate 1960.
Basements flood here mostly in June. Lucas County averages 3.8 days a year with an inch of rain or more.
Sewage backups in Lucas County spike on heavy-rain days, about 3.8 a year, when sewer mains fill up and water finds the lowest drain.
Roof leaks here come from summer downpours and, with about 73 freeze-thaw days a year, from winter ice dams. Most show up as ceiling stains in the room below.
3% of occupied homes in Lucas County heat mainly with wood or propane, below the Ohio county median of 15.9%.
About 44 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
Lucas County covers 340 square miles of northwest Ohio, with about 428,018 residents and 200,998 homes. The county seat is Toledo, and Oregon, Sylvania and Maumee round out the largest towns. Half the homes here were built before 1963, half after.
52/100 Water Damage Risk Index: Elevated Lucas County ranks 40 of 88 Ohio counties. See the statewide ranking and method.The three factors where Lucas County ranks highest compared with other Ohio counties.
Pipe-freeze risk in Lucas County sits near the middle of the state. It averaged 99 freezing nights a year over 2015–2024, 29 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 88 Ohio counties that's 56th.
On January 31, 2019 the low fell to about -11°F, and in the stretch ending March 2015 the county went 21 days in a row below freezing. Leaks from split pipes typically appear the day the thaw arrives.
Most freezing nights fall from December to March, peaking in January. Disconnect garden hoses and shut off outdoor spigots before the first hard frost, and keep the heat at 55°F or higher if you'll be away.
Freezing nights typically start around Nov 5 and end around Apr 17.
Lucas gets fewer downpours than most Ohio counties, but they still fill basements. Of roughly 34 inches of yearly precipitation, the damage comes from the 3.8 days a year with an inch or more, ranked 79th of 88. May, June and August see the most. The single wettest day in the record: 2.41 inches, September 22, 2021. The worst three-day stretch dropped 4.93 inches, ending September 23, 2021, the kind of soaking that overwhelms sump pumps and storm sewers.
About 73 days a year swing from below freezing at night to above freezing by day. Those freeze-thaw cycles feed ice dams on roofs, open cracks in foundations and driveways, and stress pipes that are already marginal.
Housing
Ohio's 88 counties range widely in housing age; Lucas ranks 13th, with 73% of its homes built before 1980.
In Lucas County 47% 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.
Renters occupy 38% of homes. If you rent, the building is usually the landlord's to repair, but your belongings are only covered by renters insurance.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 44 times a year here, above the Ohio county median of 35. 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, Lucas County homes break down as 75% utility gas, 21% electric, 3% propane and under 1% wood. Most homes here heat with gas or electricity, so cooking and electrical faults are the likelier fire sources. Even a contained kitchen fire can send soot through the ductwork to every room.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Lucas County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Fulton and Henry get more pipe-freeze nights than Lucas. Its housing is the oldest in the area by share of homes built before 1980.
By the numbers
| Factor | Lucas | Ohio median | Rank |
|---|---|---|---|
| Homes built before 1960 | 47% | 37% | 10 of 88 |
| Homes built before 1980 | 73% | 61% | 13 of 88 |
| Homes built 2000 or later | 11% | 17% | 69 of 88 |
| Manufactured or mobile homes | 2.1% | 5.9% | 74 of 88 |
| Vacant homes | 8.8% | 8.4% | 39 of 88 |
| Wood or propane heat | 2.8% | 16% | 83 of 88 |
| Nights at 20°F or colder | 29/yr | 31/yr | 56 of 88 |
| Days with 1 inch+ of rain | 3.8/yr | 5.7/yr | 79 of 88 |
| Freeze-thaw days | 73/yr | 82/yr | 84 of 88 |
| Muggy nights (65°F+) | 44/yr | 35/yr | 12 of 88 |
Rank 1 is the highest value. Bars run from the lowest to the highest Ohio county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Lucas County: freezing from December to March, heavy rain in May, June 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