Photo: Joseph E. B. Elliot · Public domainLess hazard damage per building is expected in Columbia than in 83% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Columbia gets an A− for hazard risk: lower expected damage per building than 83% of U.S. towns, #363 of 1,037 in Pennsylvania. Most of that expected damage is river and rain flooding (68%), then hurricanes (17%). Flood insurance has paid 47 claims here since 1978.
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 Columbia’s natural hazards
From FEMA’s model and FEMA’s records, below.
What Columbia 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 Columbia’s grade
River and rain flooding is 68% of the building damage FEMA expects in Columbia, and Columbia’s rate of river and rain flooding damage is lower than 74% of U.S. census tracts. Next is hurricanes at 17% (higher than 82% of U.S. census tracts).
A− #363 of 1,037 in Pennsylvania; lower expected damage per building than 83% of U.S. towns (21,298).
Columbia’s residents live in 3 census tracts; FEMA’s figures are combined by where they live.
The typical Pennsylvania town has lower expected damage than 71% of U.S. towns; within the state, Columbia has less expected damage per building than 65% of Pennsylvania towns.
In dollars, FEMA expects about $2.0M a year in losses across Columbia: $1.6M to buildings, the rest to people and crops.
Does Columbia flood? Sometimes: 47 flood claims since 1978
Every paid claim on a federal flood insurance policy in Columbia, from FEMA’s records: 9.5 per 1,000 homes, more than 73% of the 13,809 U.S. towns with a flood insurance record.
- Tropical Storm Lee5 claims · $81K
- Tropical Storm Ivan1 claim · $16K
Columbia isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Lancaster County.1 federal disaster brought FEMA money to Columbia
Disasters that paid out in Columbia itself (aid to households or repair grants to the Borough of Columbia), newest first, with that year’s flood claims.
- 2011Tropical Storm Lee142 households applied for aid$340K aid approved5 flood claims paid for it, $81K
Lancaster County has had 18 natural disasters declared by the President since 1953, most often floods, then winter storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Columbia after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Columbia archive →Columbia and its neighbors
Columbia has the lowest expected damage per building of the 3 graded towns here. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Columbia | A−less damage than 83% | river and rain flooding | 47 |
| West Hempfield Township | B+less damage than 66% | river and rain flooding | 25 |
| Manor Township | B−more damage than 52% | river and rain flooding | 133 |
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 Columbia 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 Columbia
Is Columbia at risk for natural disasters?
On FEMA’s National Risk Index, Columbia has lower expected damage per building than 83% of U.S. towns: A− for hazard risk, #363 of 1,037 in Pennsylvania. Most of the expected damage is river and rain flooding (68%) and hurricanes (17%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Columbia flood?
Flood insurance has paid 47 claims in Columbia since 1978, $364K in all, or 9.5 per 1,000 homes, more than 73% of U.S. towns with a flood insurance record. 2 properties have flooded more than once. The most claims came from Tropical Storm Lee (5).
Is Columbia 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 Lancaster County, 27% of homes in mapped flood zones carry federal flood insurance, and 0.4% of all homes do.
How much is flood insurance in Columbia?
FEMA’s Community Rating System list shows no discount for Columbia’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 Columbia?
By FEMA money that reached Columbia, Tropical Storm Lee (2011): 142 households applied for aid, $340K approved. By flood claims, Tropical Storm Lee: 5 paid, $81K.
Is Columbia at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (68%), and Columbia’s rate for it is lower than 74% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Columbia.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Columbia’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.