Manderson’s biggest natural hazard is inland flooding
Most of the natural-hazard damage FEMA expects in Manderson comes from inland flooding, and overall the risk is very high for a U.S. community. Flood insurance has paid 2 claims here since 1978.
What stands out about Manderson’s weather risks
Read from FEMA’s records below. The page puts what stands out first.
Does Manderson flood? Rarely: 2 flood claims since 1978
Every paid claim on a federal flood insurance policy in Manderson, from FEMA’s records.
Manderson isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Big Horn County.How exposed is Manderson?
FEMA expects yearly storm and flood damage to homes and buildings here to be higher than in 81% of U.S. communities, mostly from inland flooding.
Rated higher than 185 of the 205 Wyoming towns we cover.
Manderson is smaller than a census tract, so it shares the figures of the tract around its center.
What Manderson faces
Each hazard’s share of the damage FEMA expects here, and how it compares with the rest of the country.
Inland flooding
Cold waves
Landslides
Earthquakes
Federal disasters declared here
None of the disasters declared for Big Horn County shows FEMA aid or repair money reaching Manderson itself in FEMA’s records.
Big Horn County has had 2 natural disasters declared since 1953, most often severe storms and floods.
Get ready for what Manderson actually faces
A short kit for its top hazards, 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.
- Let faucets drip so pipes don’t freeze.
- Know where your water shutoff is.
- Never heat the house with the oven or a grill.
- Watch for new cracks, tilting trees or suddenly muddy streams after heavy rain.
- Stay off steep slopes in a downpour.
- Leave if you hear rumbling upslope.
- 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.
What these numbers can and can’t tell you
- An average, not a forecast. FEMA’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 there, so a big city isn’t rated riskier just for having more buildings.
- Money that reached town. Flood claims are matched to Manderson’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Manderson.
- It follows property value. FEMA’s model weighs damage to buildings, so a place that recently lost many homes can rate lower than it feels.
Storm stories
Memories, warnings and help from neighbors in Manderson.
Your answer becomes a post in Town Square.
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. Preparedness tips: Ready.gov. An average of past damage, not a forecast.