San Jacinto County, Texas · Coldspring
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Pipes freeze in San Jacinto County on about 1 night a year, mostly midwinter. Older homes, 8% of the stock here, are most at risk.
Basements flood here mostly in May. San Jacinto County averages 16.1 days a year with an inch of rain or more.
Backups often follow heavy rain, which San Jacinto County gets about 16.1 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
Roof leaks here come from summer downpours. Most show up as ceiling stains in the room below.
12% of occupied homes in San Jacinto County heat mainly with wood or propane, above the Texas county median of 6.5%.
With 159 muggy nights a year, mold in San Jacinto County can appear within days of a leak. Dry first, then clean.
Local risk profile
San Jacinto County covers 569 square miles of eastern Texas, with about 28,441 residents and 15,011 homes. Besides Coldspring, the county seat, the biggest communities are Shepherd, Point Blank and Cape Royale. Much of its housing is recent, with a median build year of 1991.
45/100 Water Damage Risk Index: Elevated San Jacinto County ranks 164 of 232 Texas counties. See the statewide ranking and method.The three factors where San Jacinto County ranks highest compared with other Texas counties.
San Jacinto County is milder than most of Texas, but not mild enough to skip winterizing. In the 2015–2024 record the county logged about 1 night a year at or below 20°F (159th of 232) and 10 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
With only about 10 freezing nights a year, many homes here aren't built for cold, so a single arctic outbreak can burst pipes across the county. The record low in this data was about 8°F, on February 16, 2021.
Heavy rain is a bigger factor here than in most of Texas. Of roughly 57.9 inches of yearly precipitation, the damage comes from the 16.1 days a year with an inch or more, ranked 17th of 232. April, May and December see the most. The single wettest day in the record: 10.16 inches, August 28, 2017. Multi-day storms matter most for basements; the wettest three days on record here totaled 24.03 inches (through August 29, 2017).
Housing
32% of homes in San Jacinto County predate 1980, below the Texas county median of 45.8%, which ranks 189th of Texas's 232 counties.
36% of homes were built in 2000 or later, more than in most of Texas. Newer plumbing rarely corrodes, so damage here tends to come from appliance supply lines, water heaters, sump pumps and storms.
The 1980s and 1990s account for 32% 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.
Here 23% of housing is manufactured homes. Check the skirting and the heat tape on the main water line every fall, because that one exposed line is what freezes.
The Census counted 28% of homes as vacant, above the Texas county median of 16.6%. Empty houses are where a small leak turns into a large claim, because nobody is there to hear it.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 159 times a year here, above the Texas county median of 129. 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 expectHeating fuel matters for fire risk. In San Jacinto County it's 6% utility gas, 81% electric, 10% propane and 2% wood. Wood and propane heat are above the Texas norm. Annual chimney and vent inspection, which the NFPA recommends, is one of the most effective fire-prevention habits for these homes.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across San Jacinto County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
San Jacinto gets more pipe-freeze nights than any of its neighbors. Polk County has the oldest housing nearby, with 34% of homes built before 1980.
By the numbers
| Factor | San Jacinto | Texas median | Rank |
|---|---|---|---|
| Homes built before 1960 | 8.1% | 20% | 201 of 232 |
| Homes built before 1980 | 32% | 46% | 189 of 232 |
| Homes built 2000 or later | 36% | 26% | 51 of 232 |
| Manufactured or mobile homes | 23% | 13% | 32 of 232 |
| Vacant homes | 28% | 17% | 25 of 232 |
| Wood or propane heat | 12% | 6.5% | 58 of 232 |
| Nights at 20°F or colder | 1/yr | 3/yr | 159 of 232 |
| Days with 1 inch+ of rain | 16/yr | 7.8/yr | 17 of 232 |
| Freeze-thaw days | 10/yr | 27/yr | 182 of 232 |
| Muggy nights (65°F+) | 159/yr | 129/yr | 52 of 232 |
Rank 1 is the highest value. Bars run from the lowest to the highest Texas county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in San Jacinto County: freezing from midwinter, heavy rain in April, May 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