Photo: United States Air Force · Public domainOn FEMA’s figures, Grissom AFB faces less hazard damage per building than 91% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Grissom AFB gets an A for hazard risk: lower expected damage per building than 91% of U.S. towns, #59 of 593 in Indiana. Most of that expected damage is river and rain flooding (62%), then tornadoes (17%). 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 Grissom AFB 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
Tornadoes
Hail
Earthquakes
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 Grissom AFB’s grade
River and rain flooding is 62% of the building damage FEMA expects in Grissom AFB, and Grissom AFB’s rate of river and rain flooding damage is lower than 87% of U.S. census tracts. Next is tornadoes at 17% (higher than 77% of U.S. census tracts).
A #59 of 593 in Indiana; lower expected damage per building than 91% of U.S. towns (21,298).
All of Grissom AFB’s residents live in one census tract; the figures are that tract’s.
The typical Indiana town has lower expected damage than 60% of U.S. towns; within the state, Grissom AFB has less expected damage per building than 90% of Indiana towns.
In dollars, FEMA expects about $495K a year in losses across Grissom AFB: $199K to buildings, the rest to people and crops.
Does Grissom AFB flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Grissom AFB. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Grissom AFB isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Miami County.The storms Grissom AFB remembers
None of the 12 disasters declared for Miami County shows FEMA aid or repair money reaching Grissom AFB itself in FEMA’s records, so these are its biggest flood-claim years.
Miami County has had 12 natural disasters declared by the President since 1953, most often winter storms, then severe storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Get ready for what Grissom AFB 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.
- Pick your spot now: the lowest floor, an inside room, no windows.
- A watch means be ready; a warning means take cover now.
- Keep shoes and a flashlight by the bed.
- Park in a garage or under cover when storms are forecast.
- Stay away from windows while it falls.
- Photograph roof and car damage for your insurer.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- 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 Grissom AFB
Is Grissom AFB at risk for natural disasters?
On FEMA’s National Risk Index, Grissom AFB has lower expected damage per building than 91% of U.S. towns: A for hazard risk, #59 of 593 in Indiana. Most of the expected damage is river and rain flooding (62%) and tornadoes (17%). 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 Grissom AFB 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 Miami County, 11% of homes in mapped flood zones carry federal flood insurance, and 0.3% of all homes do.
How much is flood insurance in Grissom AFB?
FEMA’s Community Rating System list shows no discount for Grissom AFB’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is Grissom AFB at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (62%), and Grissom AFB’s rate for it is lower than 87% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Grissom AFB.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Grissom AFB’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.