Grantley’s biggest natural hazard is inland flooding
Most of the natural-hazard damage FEMA expects in Grantley comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 22 claims here since 1978.
What stands out about Grantley’s weather risks
Read from FEMA’s records below. The page puts what stands out first.
How exposed is Grantley?
FEMA expects yearly storm and flood damage to homes and buildings here to be higher than in 39% of U.S. communities, mostly from inland flooding.
Calmer than 1,292 of the 2,558 Pennsylvania towns we cover.
Grantley covers 1 census tract, combined by population.
What Grantley faces
Each hazard’s share of the damage FEMA expects here, and how it compares with the rest of the country.
Inland flooding
Hurricanes
Earthquakes
Does Grantley flood? Sometimes: 22 flood claims since 1978
Every paid claim on a federal flood insurance policy in Grantley, from FEMA’s records.
- The Not a named storm1 claim · $1K
Grantley 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.The storms Grantley remembers
None of the disasters declared for York County shows FEMA aid or repair money reaching Grantley itself in FEMA’s records.
- 197910 flood claims paidThe most in any one year on record
York County has had 18 natural disasters declared since 1953, most often hurricanes and floods.
Old photos of Grantley after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Grantley archive →Get ready for what Grantley 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.
- 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.
Grantley and its neighbors
Grantley ranks 3rd calmest of 4 towns around it. Tap a town to see its hazards.
| Town | Rating | Mostly | Flood claims |
|---|---|---|---|
| Grantley | Low | inland flooding | 22 |
| York | Low | inland flooding | 42 |
| West Manchester | Low | inland flooding | 24 |
| Spring Garden | Low | inland flooding | 22 |
Rating = expected yearly storm and flood damage as a share of what’s there, vs. U.S. communities. Flood claims = paid federal flood insurance claims on record.
Most disasters here begin in August–October
The month each of York County’s 18 declared disasters began, since 1953.
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 Grantley’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to Grantley.
- 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. Across Grantley, expected losses total about $2.4M a year, counting buildings, people and crops.
Storm stories
Memories, warnings and help from neighbors in Grantley.
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.