Natural hazards · Dahlgren

Dahlgren, IL natural hazards

Most of the natural-hazard damage FEMA expects in Dahlgren comes from earthquakes, and overall the risk is high for a U.S. community.

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

Expected damage

How exposed is Dahlgren?

High

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Dahlgren to be higher than in 65% of U.S. communities, mostly from earthquakes and inland flooding.

Earthquakes61%Inland flooding15%Tornadoes7%Strong wind6%Everything else11%

By hazard

What Dahlgren faces

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

Earthquakes

61% of expected damage

Well above average · higher than 90% of U.S. places

Inland flooding

15% of expected damage

Well below average · higher than 12% of U.S. places

Recorded about once a year in the area

Tornadoes

7% of expected damage

Well above average · higher than 82% of U.S. places

Recorded about once every 7 years in the area

Strong wind

6% of expected damage

Well above average · higher than 94% of U.S. places

Recorded about 4 times a year in the area

Lower here

HurricanesHailIce stormsWinter weatherCold wavesHeat wavesWildfireLandslidesLightningDrought

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 Dahlgren flood?

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

Disasters that hit Dahlgren

Federal disasters declared here

None of the disasters declared for Hamilton County shows FEMA aid or repair money reaching Dahlgren itself in FEMA’s records.

Brought FEMA money into DahlgrenDeclared for Hamilton County only

Hamilton County has had 8 natural disasters declared since 1953, most often severe storms and tornadoes.

Around Dahlgren

Dahlgren and the towns around it

Very lowLowModerateHighVery high

Four Milemostly inland floodingHigh

Pendletonmostly earthquakesHigh

Moores Prairiemostly earthquakesHigh

Dahlgrenmostly earthquakesHigh

Crouchmostly earthquakesHigh

South Crouchmostly earthquakesHigh

Knight Prairiemostly earthquakesHigh

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. Dahlgren is smaller than a census tract, so it shares the figures of the tract around its center.

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

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.