Photo: Doug Kerr from Albany, NY, United States · CC BY-SA 2.0On FEMA’s figures, Dallastown faces less hazard damage per building than 95% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Dallastown gets an A for hazard risk: lower expected damage per building than 95% of U.S. towns, #122 of 1,037 in Pennsylvania. Most of that expected damage is river and rain flooding (65%), then hurricanes (25%). Flood insurance has paid 1 claim 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 Dallastown 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 Dallastown’s grade
River and rain flooding is 65% of the building damage FEMA expects in Dallastown, and Dallastown’s rate of river and rain flooding damage is lower than 89% of U.S. census tracts. Next is hurricanes at 25% (higher than 83% of U.S. census tracts).
A #122 of 1,037 in Pennsylvania; lower expected damage per building than 95% of U.S. towns (21,298).
All of Dallastown’s residents live in one census tract; the figures are that tract’s.
The typical Pennsylvania town has lower expected damage than 71% of U.S. towns; within the state, Dallastown has less expected damage per building than 88% of Pennsylvania towns.
In dollars, FEMA expects about $496K a year in losses across Dallastown: $338K to buildings, the rest to people and crops.
Does Dallastown flood? Rarely: 1 flood claim since 1978
Every paid claim on a federal flood insurance policy in Dallastown, from FEMA’s records: 0.6 per 1,000 homes, fewer than 87% of the 13,809 U.S. towns with a flood insurance record.
Dallastown isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: York County.2 federal disasters brought FEMA money to Dallastown
Disasters that paid out in Dallastown itself (aid to households or repair grants to the Borough of Dallastown), newest first, with that year’s flood claims.
- 2021Remnants of Hurricane Ida51 households applied for aid$19K aid approved
- 2011Tropical Storm Lee69 households applied for aid$132K aid approved
York County has had 17 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 Dallastown after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Dallastown archive →Get ready for what Dallastown 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 Dallastown
Is Dallastown at risk for natural disasters?
On FEMA’s National Risk Index, Dallastown has lower expected damage per building than 95% of U.S. towns: A for hazard risk, #122 of 1,037 in Pennsylvania. Most of the expected damage is river and rain flooding (65%) and hurricanes (25%). 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 Dallastown flood?
Flood insurance has paid 1 claim in Dallastown since 1978, $3K in all, or 0.6 per 1,000 homes, fewer than 87% of U.S. towns with a flood insurance record.
Is Dallastown 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 York County, 30% of homes in mapped flood zones carry federal flood insurance, and 0.4% of all homes do.
How much is flood insurance in Dallastown?
FEMA’s Community Rating System list shows no discount for Dallastown’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 Dallastown?
By FEMA money that reached Dallastown, Tropical Storm Lee (2011): 69 households applied for aid, $132K approved.
Is Dallastown at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (65%), and Dallastown’s rate for it is lower than 89% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Dallastown.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Dallastown’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.