Natural hazards · Potosi

Potosi, MO natural hazards

Most of the natural-hazard damage FEMA expects in Potosi comes from heat waves, and overall the risk is high for a U.S. community. Flood insurance has paid 9 claims here since 1985. 7 federal disasters brought FEMA money into town.

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

How exposed is Potosi?

74
High
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Potosi to be higher than in 74% of U.S. communities, mostly from heat waves and inland flooding.

Heat waves25%Inland flooding23%Cold waves20%Earthquakes17%Tornadoes8%Everything else7%
By hazard

What Potosi faces

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

Heat waves

25% of expected damage
Above average · higher than 66% of U.S. places
Recorded about 11 times a year in the area

Inland flooding

23% of expected damage
Above average · higher than 72% of U.S. places
Recorded about once a year in the area

Cold waves

20% of expected damage
Well below average · higher than 17% of U.S. places
Recorded about once a year in the area

Earthquakes

17% of expected damage
Well above average · higher than 85% of U.S. places

Tornadoes

8% of expected damage
Well above average · higher than 83% of U.S. places

Lower here

HurricanesHailIce stormsWinter weatherWildfireLandslidesStrong windLightning

Not a risk here

Coastal floodingDroughtAvalanchesTsunamisVolcanic 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 Potosi flood?

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

9paid claims since 1985
$87Kpaid to owners
1homes flooded more than once
19852026

Homes that flooded again and again

■ FEMA “severe repetitive loss” (0) ■ flooded 2+ times

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

What’s been done with FEMA grants

2storm safe rooms built
Disasters that hit Potosi

7 federal disasters brought FEMA money here

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

Brought FEMA money into PotosiDeclared for Washington County only
2025

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

11 households applied for aid $117K aid approved $53K to the City of Potosi for repairs
2011

Severe Storms, Tornadoes, and Flooding

$6K to the City of Potosi for repairs
2009

Severe Storms, Tornadoes, and Flooding

7 households applied for aid $14K aid approved
2008

Severe Storms and Flooding

26 households applied for aid $28K aid approved
2006

Severe Winter Storms

$27K to the City of Potosi for repairs
2006

Severe Storms

$40K to the City of Potosi for repairs
2003

Severe Storms, Tornadoes, and Flooding

11 households applied for aid $13K aid approved
Washington County has had 23 natural disasters declared since 1953, most often severe storms and floods.
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. Potosi covers 1 census tract, combined by population.
Money that reached townFlood claims are matched to Potosi’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Potosi. 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 Potosi total about $4.1M 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