Natural hazards · Dunham

Dunham, IL natural hazards

Most of the natural-hazard damage FEMA expects in Dunham comes from inland flooding, and overall the risk is very low for a U.S. community.

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

Expected damage

How exposed is Dunham?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Dunham to be higher than in 13% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding49%Tornadoes21%Cold waves18%Everything else12%

By hazard

What Dunham faces

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

Inland flooding

49% of expected damage

Below average · higher than 25% of U.S. places

Recorded about once a year in the area

Tornadoes

21% of expected damage

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

Recorded about once every 13 years in the area

Cold waves

18% of expected damage

Below average · higher than 31% of U.S. places

Recorded about 6 times a year in the area

Lower here

HurricanesHailIce 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 Dunham flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: McHenry County.

Disasters that hit Dunham

Federal disasters declared here

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

Brought FEMA money into DunhamDeclared for McHenry County only

McHenry County has had 14 natural disasters declared since 1953, most often winter storms and floods.

Around Dunham

Dunham and the towns around it

Very lowLowModerateHighVery high

Marengomostly inland floodingModerate

Boonemostly inland floodingLow

Chemungmostly inland floodingVery low

Dunhammostly inland floodingVery low

Hartlandmostly inland floodingVery low

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. Dunham 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 Dunham’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Township of Dunham. 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.