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Commerce Block commercial building in Glenrock, WY USAPhoto: Andrew Farkas · CC BY-SA 3.0
C−Hazard risk
Natural hazards in Glenrock · FEMA

On FEMA’s figures, Glenrock faces more hazard damage per building than 82% of U.S. towns, mostly from river and rain flooding

On FEMA’s National Risk Index, Glenrock gets a C− for hazard risk: higher expected damage per building than 82% of U.S. towns. Most of that expected damage is river and rain flooding (89%). Flood insurance has paid 5 claims here since 1978.

River and rain flooding 89%Wildfire 4%Earthquakes 4%

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

more than 82%of U.S. townsLess damageMoreExpected yearly damage per dollar of building, vs. the 21,298 U.S. towns we grade
Hazard risk
C−
in Wyoming · higher than 82% of U.S. towns
Main hazard
River and rain flooding
89% of expected building damage
Flood claims
5
paid since 1978 · $74K
Flood claims per home
4 per 1,000
more than 54% of U.S. towns
By hazard

What Glenrock 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

89%of expected building damage
Well above average · higher than 90% of U.S. census tracts
Recorded about once every 6 years in the area
Smaller shares here
 Wildfire Earthquakes Hail Tornadoes Winter storms Ice storms Cold waves top 4% Lightning Strong wind Heat waves Landslides
FEMA models no building damage here
Coastal floodingHurricanesAvalanchesTsunamisVolcanic activity
People, not buildings.Counting harm to people as well as buildings, FEMA’s model puts cold waves at 26% of Glenrock’s expected losses. Cold waves do little damage to buildings (0.1%), so they aren’t part of the grade.

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.

Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.
Hazard risk grade

What’s behind Glenrock’s grade

River and rain flooding is 89% of the building damage FEMA expects in Glenrock, and Glenrock’s rate of river and rain flooding damage is higher than 90% of U.S. census tracts. Wildfire adds 4%, at a rate in the top 6% of U.S. census tracts.

Where Glenrock sits
Glenrock
Least damageMiddleMost damage

C− higher expected damage per building than 82% of U.S. towns (21,298).

All of Glenrock’s residents live in one census tract; the figures are that tract’s.

What drives the damage to buildings
River and rain flooding89%Wildfire4%Earthquakes4%Everything else3%

In dollars, FEMA expects about $1.4M a year in losses across Glenrock: $924K to buildings, the rest to people and crops.

Shared tract.All of Glenrock’s 2,420 residents (2020 census) live in one census tract. FEMA publishes its model by tract, so the rate and the hazard mix are the tract’s. The flood claims below are the town’s own.
A shared figure. The grade describes the whole tract, not each street in it, and FEMA’s model is an average year for today’s buildings, not a record: the claims below are the record.

How TownRatings grades hazard risk →

Flood insurance claims

Does Glenrock flood? Rarely: 5 flood claims since 1978

Every paid claim on a federal flood insurance policy in Glenrock, from FEMA’s records: 3.9 per 1,000 homes, more than 54% of the 13,809 U.S. towns with a flood insurance record.

Paid flood claims, by year
1978: 2 claims1979: 0 claims1980: 0 claims1981: 0 claims1982: 1 claim1983: 0 claims1984: 1 claim1985: 0 claims1986: 0 claims1987: 0 claims1988: 0 claims1989: 0 claims1990: 0 claims1991: 0 claims1992: 0 claims1993: 0 claims1994: 0 claims1995: 0 claims1996: 0 claims1997: 0 claims1998: 0 claims1999: 0 claims2000: 0 claims2001: 0 claims2002: 0 claims2003: 0 claims2004: 0 claims2005: 0 claims2006: 0 claims2007: 0 claims2008: 0 claims2009: 0 claims2010: 0 claims2011: 0 claims2012: 0 claims2013: 0 claims2014: 0 claims2015: 0 claims2016: 0 claims2017: 0 claims2018: 0 claims2019: 0 claims2020: 0 claims2021: 0 claims2022: 0 claims2023: 1 claim2024: 0 claims2025: 0 claims2026: 0 claims197819821984
19782026
5
paid claims since 1978
$74K
paid to owners
0
homes flooded more than once
$15K
average claim
of homes in flood zones are insured
of all homes are insured
No community discount

Glenrock isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Converse County.
Disasters

The storms Glenrock remembers

None of the 1 disasters declared for Converse County shows FEMA aid or repair money reaching Glenrock itself in FEMA’s records, so these are its biggest flood-claim years.

  1. 19782 flood claims paidThe year of Severe Storms, Flooding and Mudslides, declared for Converse County
  2. 19821 flood claims paidNo declaration for the county that year
  3. 19841 flood claims paidNo declaration for the county that year
Disasters declared, by decade
Paid out in GlenrockConverse County only

Converse County has had 1 natural disasters declared by the President since 1953, most often floods.

Also 2 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Converse County, 2002–2012.

Were you here?

Old photos of Glenrock after a storm or flood belong in the town’s history. Add one, or share what you remember below.

Add to the Glenrock archive →
Be ready

Get ready for what Glenrock faces

A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.

When the river rises
  • 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.
More from Ready.gov ↗
Before you buy or rent
  • 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.
When a storm is coming
Forecast and alertsWeather →911, the nearest ERSafety →

Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.

Questions about natural hazards in Glenrock

Is Glenrock at risk for natural disasters?

On FEMA’s National Risk Index, Glenrock has higher expected damage per building than 82% of U.S. towns: C− for hazard risk. Most of the expected damage is river and rain flooding (89%). 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 Glenrock flood?

Flood insurance has paid 5 claims in Glenrock since 1978, $74K in all, or 3.9 per 1,000 homes, more than 54% of U.S. towns with a flood insurance record.

Is Glenrock 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 Converse County, 4% of homes in mapped flood zones carry federal flood insurance, and 0.3% of all homes do.

How much is flood insurance in Glenrock?

FEMA’s Community Rating System list shows no discount for Glenrock’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.

Is Glenrock at risk from river and rain flooding?

It is the largest share of the building damage FEMA expects here (89%), and Glenrock’s rate for it is higher than 90% of U.S. census tracts.

Storm stories

Memories, warnings and help from neighbors in Glenrock.

Town Square →
Start the conversation

Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Glenrock’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.