FEMA rates relative winter weather risk for Williamson County as very high and reports FEMA annualized frequency of 1.238 per year for the area.
FEMA summary
FEMA's profile for Williamson County reports FEMA annualized frequency of 1.238 per year for winter weather. FEMA's relative risk rating for the area is very high; the annualized frequency is a separate measure.
Hazard metrics cover FEMA county-equivalent geographies rather than individual addresses or parcels. Use local or state hazard maps before making a property, insurance, retrofit, or evacuation decision.
Select a hazard to inspect FEMA's figures for Williamson County.
Winter Weather
FEMA combines its area-wide loss estimate and community data in this relative rating. Event frequency appears separately below.
Relative FEMA score
99.4/100
Occurrence thresholds vary by hazard. The FEMA methodology defines the value for each hazard.
The area loss estimate combines FEMA's modeled losses to buildings, population, and agriculture across Williamson County. It is not an estimate for a home or address.
City risk summary
For Round Rock, FEMA rates winter weather risk for Williamson County as very high, with a relative score of 99.4/100. The next highest relative scores are heat wave at 97.0/100 and cold wave at 96.2/100.
Using FEMA data for Williamson County, Round Rock is #5 among 53 covered Texas entries for winter weather risk. Austin is about 17 straight-line miles from the Round Rock map point; its FEMA figures cover Travis County.
For homeowners and movers
Preparedness actions
Living in Round Rock? Learn how to handle water storage, sanitation, and security in a small space.
The map shows Round Rock. All FEMA figures on this page cover Williamson County.
The FEMA figures cover Williamson County. Address-level conditions require local maps, building records, and property details.
FEMA rates relative winter weather risk for Williamson County as very high. Its FEMA annualized frequency is 1.238 per year. Damage at a specific address also depends on the building, soil, elevation, and exact hazard zone.
Among 53 Texas cities covered by this directory, Round Rock is #5 for relative winter weather risk based on FEMA's score for Williamson County. Homes within Round Rock can have different soil, elevation, construction, and hazard-zone conditions.
In FEMA's data for Williamson County, the highest relative ratings are Winter Weather (Very High), Heat Wave (Relatively High), and Cold Wave (Relatively High). FEMA uses estimated losses and community data along with event frequency when assigning these ratings.
The hazard numbers cover Williamson County. For an individual home, check local fault, flood, fire, evacuation, and building records for the exact address.
FEMA gives Williamson County an overall relative risk rating of relatively moderate. Conditions at a specific home depend on its hazard zones, building type, maintenance, insurance, and access to evacuation routes and emergency services.
Start with this step: Confirm the exact hazard using official local maps before making property or insurance decisions. Know how local officials issue warnings and evacuation instructions. Use Ready.gov Be Informed and local emergency guidance for a complete plan.
Distances are measured between city coordinates.
| City | Distance | Winter Weather rating | Relative score |
|---|---|---|---|
| Austin, TX | 17 mi | Relatively High | 92.0 |
| Killeen, TX | 38 mi | Very High | 98.0 |
| Temple, TX | 43 mi | Very High | 98.0 |
| New Braunfels, TX | 63 mi | Relatively High | 94.0 |
| Waco, TX | 77 mi | Relatively High | 96.5 |
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Hazard metrics come from FEMA National Risk Index v1.19.0 (March 2023). City population and coordinates come from SimpleMaps US Cities Database. For current conditions, use official local maps, warnings, inspections, and professional advice.