Photo: NS777 · CC BY 4.0FEMA expects about as much hazard damage per building in Lewisville as in the typical U.S. town, mostly from river and rain flooding
On FEMA’s National Risk Index, Lewisville gets a B− for hazard risk: higher expected damage per building than 53% of U.S. towns, #161 of 290 in North Carolina. Most of that expected damage is river and rain flooding (83%). Flood insurance has paid 6 claims here since 2013.
Graded on FEMA’s expected yearly building damage per dollar of building value (NRI v1.20, December 2025), weighted by where residents live; flood claims are shown, not graded. How hazard risk is graded
What Lewisville faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
River and rain flooding
Tornadoes
Shares are of FEMA’s expected building damage, the measure the grade uses; ranks compare each hazard’s building-damage rate with all 85,154 U.S. census tracts. In FEMA’s terms, river and rain flooding is FEMA’s “Inland Flooding” (rivers and streams overflowing their banks, or rain overwhelming drainage). FEMA defines coastal flooding as high or rising tides and storm surge, so surge damage is counted there. Drought isn’t listed: FEMA counts its losses in crops only.
What’s behind Lewisville’s grade
River and rain flooding is 83% of the building damage FEMA expects in Lewisville, and Lewisville’s rate of river and rain flooding damage is higher than 70% of U.S. census tracts. Ice storms add 2%, at a rate in the top 8% of U.S. census tracts.
B− #161 of 290 in North Carolina; higher expected damage per building than 53% of U.S. towns (21,298).
Lewisville’s residents live in 6 census tracts; FEMA’s figures are combined by where they live.
The typical North Carolina town has lower expected damage than 51% of U.S. towns; within the state, Lewisville has more expected damage per building than 55% of North Carolina towns.
In dollars, FEMA expects about $4.0M a year in losses across Lewisville: $3.4M to buildings, the rest to people and crops.
Does Lewisville flood? Rarely: 6 flood claims since 2013
Every paid claim on a federal flood insurance policy in Lewisville, from FEMA’s records: 1.1 per 1,000 homes, fewer than 75% of the 13,809 U.S. towns with a flood insurance record.
- The 2025-08-Erin-HU1 claim · $4K
- Hurricane Michael1 claim · $13K
Lewisville isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Forsyth County.2 federal disasters brought FEMA money to Lewisville
Disasters that paid out in Lewisville itself (aid to households or repair grants to the Town of Lewisville), newest first, with that year’s flood claims.
- 2024Tropical Storm Helene22 households applied for aid$4K aid approved1 flood claim paid that year
- 2003Ice Storm$78K to the Town of Lewisville for repairs
Forsyth County has had 21 natural disasters declared by the President since 1953, most often hurricanes and tropical storms, then winter storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Lewisville after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Lewisville archive →Lewisville and its neighbors
Lewisville is 2nd of the 2 graded towns here, from least expected damage per building to most. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Clemmons | B−more damage than 52% | river and rain flooding | 5 |
| Lewisville | B−more damage than 53% | river and rain flooding | 6 |
Hazard risk = FEMA’s expected yearly building damage per dollar of building value, vs. the 21,298 U.S. towns we grade; the map is shaded by fifths of the same scale. Flood claims = paid federal flood insurance claims on record.
Get ready for what Lewisville faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- Turn around at flooded roads: a foot of moving water can carry off a car.
- Flood insurance usually takes 30 days to start, so buy it before the forecast.
- Keep papers and medicines up high, in a grab-and-go bag.
- Pick your spot now: the lowest floor, an inside room, no windows.
- A watch means be ready; a warning means take cover now.
- Keep shoes and a flashlight by the bed.
- Look up the address on FEMA’s flood map.
- Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
- Get a flood insurance quote early: policies usually start 30 days after you buy.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Questions about natural hazards in Lewisville
Is Lewisville at risk for natural disasters?
On FEMA’s National Risk Index, Lewisville has higher expected damage per building than 53% of U.S. towns: B− for hazard risk, #161 of 290 in North Carolina. Most of the expected damage is river and rain flooding (83%) and tornadoes (6%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Lewisville flood?
Flood insurance has paid 6 claims in Lewisville since 2013, $32K in all, or 1.1 per 1,000 homes, fewer than 75% of U.S. towns with a flood insurance record. 1 properties have flooded more than once. The most claims came from 2025-08-Erin-HU (1).
Is Lewisville in a flood zone?
Flood zones are drawn street by street, so the answer depends on the address: look it up on FEMA’s flood map. In Forsyth County, 45% of homes in mapped flood zones carry federal flood insurance, and 0.4% of all homes do.
How much is flood insurance in Lewisville?
FEMA’s Community Rating System list shows no discount for Lewisville’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
What was the biggest storm in Lewisville?
By FEMA money that reached Lewisville, Ice Storm (2003): $78K to the Town of Lewisville for repairs. By flood claims, 2025-08-Erin-HU: 1 paid, $4K.
Is Lewisville at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (83%), and Lewisville’s rate for it is higher than 70% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Lewisville.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Lewisville’s residents lived in the 2020 census; 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. Homes: Census ACS 2020–24. Preparedness tips: Ready.gov. FEMA’s model is an average of expected damage, not a forecast. How hazard risk is graded.