Natural hazards · Oneco

Oneco, IL natural hazards

Most of the natural-hazard damage FEMA expects in Oneco 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 Oneco?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Oneco to be higher than in 32% of U.S. communities, mostly from inland flooding.

Inland flooding54%Tornadoes14%Hail9%Cold waves9%Strong wind5%Everything else9%

By hazard

What Oneco faces

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

Inland flooding

54% of expected damage

Below average · higher than 40% of U.S. places

Recorded about once a year in the area

Tornadoes

14% of expected damage

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

Recorded about once every 13 years in the area

Hail

9% of expected damage

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

Recorded about 4 times a year in the area

Cold waves

9% of expected damage

Below average · higher than 26% of U.S. places

Recorded about 6 times a year in the area

Strong wind

5% of expected damage

Well above average · higher than 91% of U.S. places

Recorded about 5 times a year in the area

Lower here

HurricanesIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesLightningDrought

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 Oneco flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Stephenson County.

Disasters that hit Oneco

1 federal disaster brought FEMA money here

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

Brought FEMA money into OnecoDeclared for Stephenson County only

2006

Snow

$2K to the Township of Oneco for repairs

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

Around Oneco

Oneco and the towns around it

Very lowLowModerateHighVery high

Jeffersonmostly inland floodingLow

Cadizmostly inland floodingLow

Onecomostly inland floodingLow

Buckeyemostly inland floodingLow

Winslowmostly inland floodingLow

Rock Grovemostly inland floodingLow

Clarnomostly cold wavesVery 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. Oneco 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 Oneco’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Township of Oneco. 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.