More hazard damage per building is expected in Arapahoe than in 67% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Arapahoe gets a C for hazard risk: higher expected damage per building than 67% of U.S. towns. Most of that expected damage is river and rain flooding (74%), then earthquakes (13%). FEMA’s files show no paid flood insurance claims here.
Graded on FEMA’s expected yearly building damage per dollar of building value (NRI v1.20, December 2025), weighted by where residents live; flood claims are shown, not graded. How hazard risk is graded
What Arapahoe faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
River and rain flooding
Earthquakes
Wildfire
Shares are of FEMA’s expected building damage, the measure the grade uses; ranks compare each hazard’s building-damage rate with all 85,154 U.S. census tracts. In FEMA’s terms, river and rain flooding is FEMA’s “Inland Flooding” (rivers and streams overflowing their banks, or rain overwhelming drainage). FEMA defines coastal flooding as high or rising tides and storm surge, so surge damage is counted there. Drought isn’t listed: FEMA counts its losses in crops only.
What’s behind Arapahoe’s grade
River and rain flooding is 74% of the building damage FEMA expects in Arapahoe, and Arapahoe’s rate of river and rain flooding damage is higher than 73% of U.S. census tracts. Wildfire adds 12%, at a rate in the top 4% of U.S. census tracts.
C higher expected damage per building than 67% of U.S. towns (21,298).
All of Arapahoe’s residents live in one census tract; the figures are that tract’s.
In dollars, FEMA expects about $469K a year in losses across Arapahoe: $312K to buildings, the rest to people and crops.
Does Arapahoe flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Arapahoe. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Arapahoe isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Fremont County.The storms Arapahoe remembers
None of the 3 disasters declared for Fremont County shows FEMA aid or repair money reaching Arapahoe itself in FEMA’s records, so these are its biggest flood-claim years.
Fremont County has had 3 natural disasters declared by the President since 1953, most often floods, then severe storms.
Also 1 FEMA wildfire suppression grant (Fire Management Assistance, not a disaster declaration) for fires in Fremont County, 2016–2016.
Arapahoe and its neighbors
Arapahoe is 2nd of the 2 graded towns here, from least expected damage per building to most. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Riverton | A−less damage than 80% | river and rain flooding | — |
| Arapahoe | Cmore damage than 67% | river and rain flooding | 0 |
Hazard risk = FEMA’s expected yearly building damage per dollar of building value, vs. the 21,298 U.S. towns we grade; the map is shaded by fifths of the same scale. Flood claims = paid federal flood insurance claims on record.
Get ready for what Arapahoe faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- Turn around at flooded roads: a foot of moving water can carry off a car.
- Flood insurance usually takes 30 days to start, so buy it before the forecast.
- Keep papers and medicines up high, in a grab-and-go bag.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- Clear dead leaves and brush within 5 feet of the house.
- Sign up for local alerts and know two ways out.
- Keep N95 masks for smoky days.
- Look up the address on FEMA’s flood map.
- Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
- Get a flood insurance quote early: policies usually start 30 days after you buy.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Questions about natural hazards in Arapahoe
Is Arapahoe at risk for natural disasters?
On FEMA’s National Risk Index, Arapahoe has higher expected damage per building than 67% of U.S. towns: C for hazard risk. Most of the expected damage is river and rain flooding (74%) and earthquakes (13%). The figures are for the one census tract the town shares with its neighbors. This is FEMA’s model of an average year for today’s buildings, not a forecast.
Is Arapahoe in a flood zone?
Flood zones are drawn street by street, so the answer depends on the address: look it up on FEMA’s flood map. In Fremont County, 14% of homes in mapped flood zones carry federal flood insurance, and 0.2% of all homes do.
How much is flood insurance in Arapahoe?
FEMA’s Community Rating System list shows no discount for Arapahoe’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is Arapahoe at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (74%), and Arapahoe’s rate for it is higher than 73% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Arapahoe.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Arapahoe’s residents lived in the 2020 census; 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. Homes: Census ACS 2020–24. Preparedness tips: Ready.gov. FEMA’s model is an average of expected damage, not a forecast. How hazard risk is graded.