Natural hazards · Patterson

Patterson, IL natural hazards

Most of the natural-hazard damage FEMA expects in Patterson comes from inland flooding, and overall the risk is very high 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 Patterson?

Very high

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Patterson to be higher than in 91% of U.S. communities, mostly from inland flooding and drought.

Inland flooding40%Drought16%Cold waves13%Strong wind11%Heat waves7%Tornadoes6%Everything else8%

By hazard

What Patterson faces

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

Inland flooding

40% of expected damage

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

Recorded about once every 2 years in the area

Drought

16% of expected damage

Recorded about 2 times a year in the area

Cold waves

13% of expected damage

Above average · higher than 54% of U.S. places

Recorded about 3 times a year in the area

Strong wind

11% of expected damage

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

Recorded about 6 times a year in the area

Heat waves

7% of expected damage

Above average · higher than 67% of U.S. places

Recorded about 10 times a year in the area

Tornadoes

6% of expected damage

Well above average · higher than 77% of U.S. places

Recorded about once every 5 years in the area

Lower here

HurricanesHailIce 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 Patterson flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Greene County.

Disasters that hit Patterson

1 federal disaster brought FEMA money here

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

Brought FEMA money into PattersonDeclared for Greene County only

2006

Tornadoes and Severe Storms

5 households applied for aid $23K aid approved

Greene County has had 16 natural disasters declared since 1953, most often severe storms and floods.

Around Patterson

Patterson and the towns around it

Very lowLowModerateHighVery high

Pattersonmostly inland floodingVery high

Walkervillemostly inland floodingVery high

Pearlmostly inland floodingVery high

Montezumamostly inland floodingVery high

Pearlmostly inland floodingVery high

Roodhousemostly inland floodingModerate

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