Natural hazards · Rock River

Rock River, MI natural hazards

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

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

Expected damage

How exposed is Rock River?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Rock River to be higher than in 34% of U.S. communities, mostly from inland flooding and lightning.

Inland flooding58%Lightning17%Cold waves12%Hail7%Everything else6%

By hazard

What Rock River faces

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

Inland flooding

58% of expected damage

Above average · higher than 59% of U.S. places

Recorded about once every 6 years in the area

Lightning

17% of expected damage

Above average · higher than 52% of U.S. places

Cold waves

12% of expected damage

Above average · higher than 50% of U.S. places

Recorded about 2 times a year in the area

Hail

7% of expected damage

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

Recorded about once a year in the area

Lower here

TornadoesIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windDrought

Not a risk here

Coastal floodingHurricanesAvalanchesTsunamisVolcanic 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 Rock River flood?

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

of all homes
are insured

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

Insurance rates: Alger County.

Disasters that hit Rock River

Federal disasters declared here

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

Brought FEMA money into Rock RiverDeclared for Alger County only

Alger County has had 3 natural disasters declared since 1953, most often hurricanes and winter storms.

Around Rock River

Rock River and the towns around it

Very lowLowModerateHighVery high

Skandiamostly cold wavesLow

Rock Rivermostly inland floodingLow

Limestonemostly inland floodingLow

Au Trainmostly inland floodingLow

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