Rockwall County, Texas · Rockwall
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With 1% of homes built before 1960 and about 3 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
May brings the most downpours to Rockwall County, part of 12.2 heavy-rain days a year. Check the sump first.
Sewage backups in Rockwall County spike on heavy-rain days, about 12.2 a year, when sewer mains fill up and water finds the lowest drain.
Rockwall County's wettest day in the 2015–2024 record brought 4.77 inches, and about 22 freeze-thaw days a year mean ice dams in some winters.
5% of occupied homes in Rockwall County heat mainly with wood or propane, below the Texas county median of 6.5%.
Muggy summer nights, lows of 65°F or more, come about 134 times a year in Rockwall County. Mold after a leak spreads fastest from June through August.
Local risk profile
Rockwall County covers 127 square miles of eastern Texas, with about 123,617 residents and 43,580 homes. Besides Rockwall, the county seat, the biggest communities are Fate, Royse City and Heath. Much of its housing is recent, with a median build year of 2006.
42/100 Water Damage Risk Index: Moderate Rockwall County ranks 179 of 232 Texas counties. See the statewide ranking and method.The three factors where Rockwall County ranks highest compared with other Texas counties.
For frozen pipes, Rockwall County is a typical Texas county, which is still plenty. In the 2015–2024 record the county logged about 3 nights a year at or below 20°F (94th of 232) and 24 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
The longest cold spell was straight 9 days without the temperature rising above freezing, ending in February 2021. The coldest night reached about 0°F on February 16, 2021. Burst pipes usually show up when a spell like that breaks and the ice thaws.
With only about 24 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 0°F, on February 16, 2021.
Heavy rain is a bigger factor here than in most of Texas. The county gets about 43.4 inches of rain and melted snow a year, with 12.2 days of an inch or more (66th of 232). Those downpours cluster in April, May and October, when sump pumps and gutters are tested hardest. The wettest day on record brought 4.77 inches on October 24, 2015. Multi-day storms matter most for basements; the wettest three days on record here totaled 8.41 inches (through October 25, 2015).
The temperature crosses 32°F in both directions on roughly 22 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
7% of homes in Rockwall County predate 1980, below the Texas county median of 45.8%, which ranks 232nd of Texas's 232 counties.
Since 2000 the county has added enough housing that 67% of homes are that new. Modern PEX and copper rarely fail on their own; the leaks come from connections, appliances and storms.
The 1980s and 1990s account for 26% 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
Rockwall County averages 134 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in May. 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, Rockwall County homes break down as 43% utility gas, 52% electric, 5% 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 Rockwall County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Collin and Hunt get more pipe-freeze nights than Rockwall. All of its neighbors see more heavy-rain days. Dallas County has the oldest housing nearby, with 45% of homes built before 1980.
By the numbers
| Factor | Rockwall | Texas median | Rank |
|---|---|---|---|
| Homes built before 1960 | 1.2% | 20% | 232 of 232 |
| Homes built before 1980 | 7.2% | 46% | 232 of 232 |
| Homes built 2000 or later | 67% | 26% | 1 of 232 |
| Manufactured or mobile homes | 3.2% | 13% | 221 of 232 |
| Vacant homes | 5.4% | 17% | 224 of 232 |
| Wood or propane heat | 4.8% | 6.5% | 143 of 232 |
| Nights at 20°F or colder | 3/yr | 3/yr | 94 of 232 |
| Days with 1 inch+ of rain | 12/yr | 7.8/yr | 66 of 232 |
| Freeze-thaw days | 22/yr | 27/yr | 135 of 232 |
| Muggy nights (65°F+) | 134/yr | 129/yr | 103 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 Rockwall County: freezing from midwinter, heavy rain in April, May and October.
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