Lewisville, TX
Local storm history & FEMA National Risk Index data
Lewisville is rated Relatively High for overall natural hazard risk — higher risk than most US counties — based on FEMA's National Risk Index for Denton County, TX. The county's highest-rated hazards are tornado, hail, and heat wave.
Storm events near Lewisville
NOAA-recorded tornado, hail, and flood events within 25 miles of Lewisville's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Lewisville itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Denton County's FEMA National Risk Index scores, covering Lewisville along with the rest of the county, not a Lewisville-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 93 | Relatively Moderate |
| Inland Flooding | 95.7 | Relatively High |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 74 | Relatively Low |
| Heat Wave | 98 | Relatively High |
| Tornado | 99.8 | Very High |
| Avalanche | — | Not Applicable |
| Cold Wave | 93.9 | Relatively High |
| Drought | 36.9 | Relatively Low |
| Hail | 99.7 | Very High |
| Hurricane | 58.4 | Very Low |
| Ice Storm | 97.2 | Very High |
| Landslide | 47.6 | Very Low |
| Lightning | 80.6 | Relatively Moderate |
| Strong Wind | 92.7 | Relatively High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 86.2 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Denton County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Denton County:
More on Denton County:
Frequently asked questions
What natural hazards is Lewisville, TX at risk of?
Lewisville is rated Relatively High for overall natural hazard risk by FEMA's National Risk Index — higher risk than most US counties. The highest-rated hazards for Denton County, where Lewisville is located, are tornado, hail, and heat wave.
What is Lewisville's biggest natural hazard risk?
Tornado is the highest-rated hazard for Denton County, where Lewisville is located, scoring 99.8 out of 100 on FEMA's National Risk Index (rated "Very High").
Is Lewisville a high-risk area for natural disasters?
Yes — Lewisville carries higher risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively High" for Denton County.
Has Lewisville had tornadoes, hail, or flooding?
NOAA has recorded 32 tornado, 924 hail, 197 inland flooding events within 25 miles of Lewisville since 2016.