Natural hazards · Grand Detour

Grand Detour, IL natural hazards

Most of the natural-hazard damage FEMA expects in Grand Detour comes from inland flooding, and overall the risk is low for a U.S. community. 1 federal disaster brought FEMA money into town.

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

Expected damage

How exposed is Grand Detour?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Grand Detour to be higher than in 25% of U.S. communities, mostly from inland flooding.

Inland flooding49%Cold waves15%Tornadoes15%Hail6%Drought5%Everything else10%

By hazard

What Grand Detour 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 34% of U.S. places

Recorded about once a year in the area

Cold waves

15% of expected damage

Well below average · higher than 20% of U.S. places

Recorded about 6 times a year in the area

Tornadoes

15% of expected damage

Well above average · higher than 79% of U.S. places

Recorded about once every 10 years in the area

Hail

6% of expected damage

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

Recorded about 4 times a year in the area

Drought

5% of expected damage

Recorded about 12 times a year in the area

Lower here

HurricanesIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightning

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 Grand Detour flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Ogle County.

Disasters that hit Grand Detour

1 federal disaster brought FEMA money here

Disasters the President declared that paid out in Grand Detour itself: aid to households, or repair grants to the Township of Grand Detour.

Brought FEMA money into Grand DetourDeclared for Ogle County only

2011

Severe Winter Storm and Snowstorm

$4K to the Township of Grand Detour for repairs

Ogle County has had 12 natural disasters declared since 1953, most often winter storms and floods.

Around Grand Detour

Grand Detour and the towns around it

Very lowLowModerateHighVery high

Oregon-Nashuamostly inland floodingHigh

Dixonmostly inland floodingModerate

Taylormostly inland floodingModerate

Pine Creekmostly inland floodingLow

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