Photo: Larry D. Moore · CC BY 4.0Less hazard damage per building is expected in Roundup than in 74% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Roundup gets a B+ for hazard risk: lower expected damage per building than 74% of U.S. towns. Most of that expected damage is river and rain flooding (67%), then wildfire (22%). Flood insurance has paid 45 claims here since 1979.
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 stands out about Roundup’s natural hazards
From FEMA’s model and FEMA’s records, below.
What Roundup 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
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 Roundup’s grade
River and rain flooding is 67% of the building damage FEMA expects in Roundup, and Roundup’s rate of river and rain flooding damage is lower than 68% of U.S. census tracts. Wildfire adds 22%, at a rate in the top 4% of U.S. census tracts.
B+ lower expected damage per building than 74% of U.S. towns (21,298).
All of Roundup’s residents live in one census tract; the figures are that tract’s.
In dollars, FEMA expects about $1.1M a year in losses across Roundup: $473K to buildings, the rest to people and crops.
Does Roundup flood? Sometimes: 45 flood claims since 1979
Every paid claim on a federal flood insurance policy in Roundup, from FEMA’s records: 43.6 per 1,000 homes, more than 91% of the 13,809 U.S. towns with a flood insurance record.
Roundup isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Musselshell County.2 federal disasters brought FEMA money to Roundup
Disasters that paid out in Roundup itself (aid to households or repair grants to the City of Roundup), newest first, with that year’s flood claims.
- 2014Ice Jams and Flooding$16K to the City of Roundup for repairs2 flood claims paid that year
- 2011Severe Storms and Flooding183 households applied for aid$741K aid approved$208K to the City of Roundup for repairs17 flood claims paid that year
Musselshell County has had 9 natural disasters declared by the President since 1953, most often severe storms, then floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Also 3 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Musselshell County, 1999–2020.
Old photos of Roundup after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Roundup archive →Roundup and its neighbors
Roundup has the lowest expected damage per building of the 1 graded towns here. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Roundup | B+less damage than 74% | river and rain flooding | 45 |
| Camp Three | — | 139 residents; we grade 1,000+ | |
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 Roundup 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.
- 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 Roundup
Is Roundup at risk for natural disasters?
On FEMA’s National Risk Index, Roundup has lower expected damage per building than 74% of U.S. towns: B+ for hazard risk. Most of the expected damage is river and rain flooding (67%) and wildfire (22%). 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.
Does Roundup flood?
Flood insurance has paid 45 claims in Roundup since 1979, $851K in all, or 43.6 per 1,000 homes, more than 91% of U.S. towns with a flood insurance record. 2 properties have flooded more than once.
Is Roundup 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 Musselshell County, 7% of homes in mapped flood zones carry federal flood insurance, and 0.5% of all homes do.
How much is flood insurance in Roundup?
FEMA’s Community Rating System list shows no discount for Roundup’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
What was the biggest storm in Roundup?
By FEMA money that reached Roundup, Severe Storms and Flooding (2011): 183 households applied for aid, $741K approved, and $208K to the City of Roundup for repairs.
Is Roundup at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (67%), and Roundup’s rate for it is lower than 68% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Roundup.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Roundup’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.