Natural hazards · Walnut Grove

Walnut Grove, IL natural hazards

Most of the natural-hazard damage FEMA expects in Walnut Grove comes from inland flooding, and overall the risk is moderate 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 Walnut Grove?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Walnut Grove to be higher than in 59% of U.S. communities, mostly from inland flooding and strong winds.

Inland flooding27%Strong wind17%Drought15%Cold waves13%Tornadoes11%Hail6%Everything else11%

By hazard

What Walnut Grove faces

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

Inland flooding

27% of expected damage

Above average · higher than 63% of U.S. places

Recorded about once a year in the area

Strong wind

17% of expected damage

Well above average · higher than 98% of U.S. places

Recorded about 6 times a year in the area

Drought

15% of expected damage

Recorded about 9 times a year in the area

Cold waves

13% of expected damage

Above average · higher than 62% of U.S. places

Recorded about 6 times a year in the area

Tornadoes

11% of expected damage

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

Recorded about once every 5 years in the area

Hail

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

HurricanesIce stormsWinter weatherWildfireEarthquakesLandslidesLightning

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 Walnut Grove flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Knox County.

Disasters that hit Walnut Grove

1 federal disaster brought FEMA money here

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

Brought FEMA money into Walnut GroveDeclared for Knox County only

2006

Snow

$3K to the Township of Walnut Grove for repairs

Knox County has had 9 natural disasters declared since 1953, most often floods and winter storms.

Around Walnut Grove

Walnut Grove and the towns around it

Very lowLowModerateHighVery high

Walnut Grovemostly inland floodingModerate

Lynnmostly inland floodingModerate

Copleymostly inland floodingModerate

Ontariomostly inland floodingModerate

Wellermostly inland floodingModerate

Galvamostly 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. Walnut Grove covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Walnut Grove’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Township of Walnut Grove. 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 Walnut Grove total about $1.4M 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.