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Natural hazards · Byron

Byron, MN natural hazards

Most of the natural-hazard damage FEMA expects in Byron comes from inland flooding, and overall the risk is low for a U.S. community. 4 federal disasters brought FEMA money into town.

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

How exposed is Byron?

21
Low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Byron to be higher than in 21% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding34%Cold waves33%Tornadoes22%Everything else12%
By hazard

What Byron faces

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

Inland flooding

34% of expected damage
Below average · higher than 31% of U.S. places
Recorded about once a year in the area

Cold waves

33% of expected damage
Above average · higher than 63% of U.S. places
Recorded about 10 times a year in the area

Tornadoes

22% of expected damage
Well above average · higher than 89% of U.S. places

Lower here

HailIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingHurricanesAvalanchesTsunamisVolcanic 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 Byron flood?

FEMA's records show no paid flood insurance claims in Byron.

of homes in flood zones
are insured
of all homes
are insured
No community discount. Byron isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Olmsted County.
Disasters that hit Byron

4 federal disasters brought FEMA money here

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

Brought FEMA money into ByronDeclared for Olmsted County only
2010

Severe Storms and Flooding

$16K to the City of Byron for repairs
2010

Severe Storms, Tornadoes, and Flooding

$10K to the City of Byron for repairs
2007

Severe Storms and Flooding

82 households applied for aid $119K aid approved $85K to the City of Byron for repairs
2004

Severe Storms and Flooding

1 household applied for aid $2K aid approved
Olmsted County has had 13 natural disasters declared since 1953, most often floods and severe storms.
Around Byron

Byron and the towns around it

Kalmar: Low, mostly inland floodingRochester: High, mostly inland floodingMantorville: High, mostly inland floodingCascade: Moderate, mostly inland floodingSalem: Low, mostly inland floodingNew Haven: Low, mostly inland floodingByron: Low, mostly inland flooding ByronKalmar
Very lowLowModerateHighVery high
Kalmarmostly inland floodingLow
Byronmostly 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. Byron covers 1 census tract, combined by population.
Money that reached townFlood claims are matched to Byron’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Byron. 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 Byron total about $1.8M 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.

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01
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