Natural hazards · Round Rock

Round Rock, TX natural hazards

Most of the natural-hazard damage FEMA expects in Round Rock comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 177 claims here since 1981. 6 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Round Rock?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Round Rock to be higher than in 35% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding57%Cold waves16%Hail10%Tornadoes10%Everything else8%

By hazard

What Round Rock faces

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

Inland flooding

57% of expected damage

Above average · higher than 53% of U.S. places

Recorded about 4 times a year in the area

Cold waves

16% of expected damage

Well above average · higher than 86% of U.S. places

Recorded about once every 2 years in the area

Hail

10% of expected damage

Well above average · higher than 93% of U.S. places

Recorded about 4 times a year in the area

Tornadoes

10% of expected damage

Above average · higher than 58% of U.S. places

Lower here

HurricanesIce stormsWinter weatherHeat 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 Round Rock flood?

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

177paid claims since 1981

$5.5Mpaid to owners

29homes flooded more than once

19812026

Biggest named events

Early summer storms: 13 claims, $513K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (7) ■ flooded 2+ times

of homes in flood zones
are insured

of all homes
are insured

No community discount. Round Rock isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Williamson County.

Disasters that hit Round Rock

6 federal disasters brought FEMA money here

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

Brought FEMA money into Round RockDeclared for Williamson County only

2025

Severe Storms, Straight-Line Winds, and Flooding

103 households applied for aid $43K aid approved

2023

Severe Winter Storm

$48K to the City of Round Rock for repairs

2021

Severe Winter Storms

1,160 households applied for aid $374K aid approved

2015

Severe Storms, Tornadoes, Straight-Line Winds and Flooding

51 households applied for aid $75K aid approved $34K to the City of Round Rock for repairs

2007

Severe Storms, Tornadoes, and Flooding

14 households applied for aid $14K aid approved

2005

Hurricane Katrina Evacuation

$100K to the City of Round Rock for repairs

Williamson County has had 21 natural disasters declared since 1953, most often fires and severe storms.

Around Round Rock

Round Rock and the towns around it

Very lowLowModerateHighVery high

Austinmostly inland floodingModerate

Round Rockmostly inland floodingLow

Pflugervillemostly inland floodingLow

Georgetownmostly inland floodingLow

Brushy Creekmostly inland floodingLow

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. Round Rock covers 27 census tracts, combined by population.

Money that reached townFlood claims are matched to Round Rock’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Round Rock. 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 Round Rock total about $25.9M 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.