Wester Ogle · Photo: Pubdog at en.wikipedia · Public domainLess hazard damage per building is expected in Garrison than in 97% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Garrison gets an A+ for hazard risk: lower expected damage per building than 97% of U.S. towns, #128 of 261 in Maryland. Most of that expected damage is river and rain flooding (73%), then hurricanes (14%). Flood insurance has paid 3 claims here since 1989.
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 Garrison 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
Hurricanes
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 Garrison’s grade
River and rain flooding is 73% of the building damage FEMA expects in Garrison, and Garrison’s rate of river and rain flooding damage is lower than 87% of U.S. census tracts. Next is hurricanes at 14% (higher than 78% of U.S. census tracts).
A+ #128 of 261 in Maryland; lower expected damage per building than 97% of U.S. towns (21,298).
Garrison’s residents live in 3 census tracts; FEMA’s figures are combined by where they live.
The typical Maryland town has lower expected damage than 97% of U.S. towns; within the state, Garrison has less expected damage per building than 51% of Maryland towns.
In dollars, FEMA expects about $1.9M a year in losses across Garrison: $1.3M to buildings, the rest to people and crops.
Does Garrison flood? Rarely: 3 flood claims since 1989
Every paid claim on a federal flood insurance policy in Garrison, from FEMA’s records: 0.7 per 1,000 homes, fewer than 84% of the 13,809 U.S. towns with a flood insurance record.
Garrison isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Baltimore County.The storms Garrison remembers
None of the 19 disasters declared for Baltimore County shows FEMA aid or repair money reaching Garrison itself in FEMA’s records, so these are its biggest flood-claim years.
- 19891 flood claims paidNo declaration for the county that year
- 20061 flood claims paidNo declaration for the county that year
- 20091 flood claims paidThe year of Severe Winter Storm and Snowstorm, declared for Baltimore County
Baltimore County has had 19 natural disasters declared by the President since 1953, most often winter storms, then floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Garrison after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Garrison archive →Garrison and its neighbors
Garrison is 3rd of the 4 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 |
|---|---|---|---|
| Pikesville | A+less damage than 98% | river and rain flooding | 45 |
| Owings Mills | A+less damage than 97% | river and rain flooding | 8 |
| Garrison | A+less damage than 97% | river and rain flooding | 3 |
| Randallstown | A+less damage than 96% | river and rain flooding | 14 |
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 Garrison 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.
- The season runs June through November and peaks from mid-August to mid-October.
- Bring in porch furniture and anything the wind can throw.
- Fill the gas tank and charge phones before the storm arrives.
- 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 Garrison
Is Garrison at risk for natural disasters?
On FEMA’s National Risk Index, Garrison has lower expected damage per building than 97% of U.S. towns: A+ for hazard risk, #128 of 261 in Maryland. Most of the expected damage is river and rain flooding (73%) and hurricanes (14%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Garrison flood?
Flood insurance has paid 3 claims in Garrison since 1989, $259K in all, or 0.7 per 1,000 homes, fewer than 84% of U.S. towns with a flood insurance record.
Is Garrison 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 Baltimore County, 1.2% of all homes carry federal flood insurance.
How much is flood insurance in Garrison?
FEMA’s Community Rating System list shows no discount for Garrison’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is Garrison at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (73%), and Garrison’s rate for it is lower than 87% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Garrison.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Garrison’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.