Natural hazards · Lewisville

Lewisville, TX natural hazards

Most of the natural-hazard damage FEMA expects in Lewisville comes from tornadoes, and overall the risk is moderate for a U.S. community. Flood insurance has paid 54 claims here since 1982. 6 federal disasters brought FEMA money into town.

FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarations

Expected damage

How exposed is Lewisville?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Lewisville to be higher than in 47% of U.S. communities, mostly from tornadoes and inland flooding.

Tornadoes44%Inland flooding32%Hail11%Heat waves6%Everything else7%

By hazard

What Lewisville faces

Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.

Tornadoes

44% of expected damage

Well above average · higher than 95% of U.S. places

Inland flooding

32% of expected damage

Below average · higher than 47% of U.S. places

Recorded about 3 times a year in the area

Hail

11% of expected damage

Well above average · higher than 97% of U.S. places

Recorded about 9 times a year in the area

Heat waves

6% of expected damage

Well above average · higher than 79% of U.S. places

Recorded about 18 times a year in the area

Lower here

HurricanesIce stormsWinter weatherCold wavesWildfireEarthquakesLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingAvalanchesTsunamisVolcanic activity

Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.

Flood insurance claims

Does Lewisville flood?

Every paid claim on a federal flood insurance policy in Lewisville, from FEMA’s records.

54paid claims since 1982

$1.6Mpaid to owners

7homes flooded more than once

19822026

Biggest named events

Early summer storms: 3 claims, $67K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (2) ■ flooded 2+ times

of homes in flood zones
are insured

of all homes
are insured

🏷️ 10% off flood insurance. Lewisville is in FEMA’s Community Rating System (class 8) for its flood-proofing work.

Insurance rates: Denton County.

What’s been done with FEMA grants

9storm safe rooms built

5flood-prone properties bought out and cleared

Disasters that hit Lewisville

6 federal disasters brought FEMA money here

Disasters the President declared that paid out in Lewisville itself: aid to households, or repair grants to the City of Lewisville.

Brought FEMA money into LewisvilleDeclared for Denton County only

2024

Severe Storms, Straight-Line Winds, Tornadoes, and Flooding

361 households applied for aid $249K aid approved

2021

Severe Winter Storms

1,514 households applied for aid $540K aid approved $108K to the City of Lewisville for repairs

2015

Severe Storms, Tornadoes, Straight-Line Winds and Flooding

59 households applied for aid $72K aid approved $69K to the City of Lewisville for repairs

2007

Severe Storms, Tornadoes, and Flooding

7 households applied for aid $2K aid approved

2007

Severe Storms and Tornadoes

7 households applied for aid $358 aid approved

2005

Hurricane Katrina Evacuation

$39K to the City of Lewisville for repairs

Denton County has had 19 natural disasters declared since 1953, most often severe storms and fires.

Around Lewisville

Lewisville and the towns around it

Very lowLowModerateHighVery high

Coppellmostly inland floodingHigh

Highland Villagemostly tornadoesModerate

Carrolltonmostly inland floodingModerate

Hebronmostly inland floodingModerate

Flower Moundmostly inland floodingModerate

Lewisvillemostly tornadoesModerate

Grapevinemostly inland floodingModerate

The Colonymostly tornadoesLow

Hickory Creekmostly tornadoesLow

About these numbers

How to read this page

An average, not a forecastFEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.

Compared by rate“Higher than N%” compares yearly damage as a share of what’s here, so a big city isn’t rated riskier just for having more buildings. Lewisville covers 33 census tracts, combined by population.

Money that reached townFlood claims are matched to Lewisville’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Lewisville. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across Lewisville total about $48.0M a year, counting buildings, people and crops.

Sources: FEMA National Risk Index (December 2025); OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Census tracts: U.S. Census Bureau.