FEMA rates relative tornado risk for Collin County as very high and reports historical annualized frequency of 0.87 events per year for the area.
FEMA summary
FEMA's profile for Collin County reports historical annualized frequency of 0.87 events per year for tornado. 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 Collin County.
Tornado
FEMA combines its area-wide loss estimate and community data in this relative rating. Event frequency appears separately below.
Relative FEMA score
99.9/100
FEMA annualizes recorded qualifying tornado occurrences across the FEMA geography and source period.
The area loss estimate combines FEMA's modeled losses to buildings, population, and agriculture across Collin County. It is not an estimate for a home or address.
Local context
Frisco’s official guidance covers tornadoes as part of fast-changing North Texas thunderstorms that can also bring large hail, straight-line wind, lightning, and flooding. A Frisco plan should include immediate shelter and a post-storm inspection of the roof, windows, trees, and utilities.
The city activates outdoor sirens for tornado threats, very large hail, and extreme wind. When a siren sounds, seek shelter and check current official information. Frisco also uses CodeRED for phone, email, and text alerts.
For homeowners and movers
Preparedness actions
Living in Frisco? Learn how to handle water storage, sanitation, and security in a small space.
The map shows Frisco. All FEMA figures on this page cover Collin County.
The FEMA figures cover Collin County. Address-level conditions require local maps, building records, and property details.
FEMA rates relative tornado risk for Collin County as very high. Its historical annualized frequency is 0.87 events 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, Frisco is Tied #5 for relative tornado risk based on FEMA's score for Collin County. 4 covered cities share this rank because they use the same FEMA geography. Homes within Frisco can have different soil, elevation, construction, and hazard-zone conditions.
In FEMA's data for Collin County, the highest relative ratings are Tornado (Very High), Hail (Very High), and Heat Wave (Relatively High). FEMA uses estimated losses and community data along with event frequency when assigning these ratings.
The hazard numbers cover Collin County. For an individual home, check local fault, flood, fire, evacuation, and building records for the exact address.
FEMA gives Collin County an overall relative risk rating of relatively high. 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: Identify the lowest-floor interior room or nearby rated shelter you can reach quickly. Enable Wireless Emergency Alerts and keep a battery-powered NOAA Weather Radio available. Use Ready.gov Tornadoes and local emergency guidance for a complete plan.
Distances are measured between city coordinates.
| City | Distance | Tornado rating | Relative score |
|---|---|---|---|
| Plano, TX | 8 mi | Very High | 99.9 |
| Allen, TX | 9 mi | Very High | 99.9 |
| McKinney, TX | 9 mi | Very High | 99.9 |
| Lewisville, TX | 12 mi | Very High | 99.8 |
| Carrollton, TX | 12 mi | Very High | 99.8 |
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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.