Photo: Mididuce · CC BY-SA 4.0FEMA expects about as much hazard damage per building in London Grove Township as in the typical U.S. town, mostly from river and rain flooding
On FEMA’s National Risk Index, London Grove Township gets a B for hazard risk: lower expected damage per building than 58% of U.S. towns, #684 of 1,037 in Pennsylvania. Most of that expected damage is river and rain flooding (88%). Flood insurance has paid 3 claims here since 1985.
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 London Grove Township 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
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 London Grove Township’s grade
River and rain flooding is 88% of the building damage FEMA expects in London Grove Township, and London Grove Township’s rate of river and rain flooding damage is higher than 66% of U.S. census tracts.
B #684 of 1,037 in Pennsylvania; lower expected damage per building than 58% of U.S. towns (21,298).
London Grove Township’s residents live in 2 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, London Grove Township has more expected damage per building than 66% of Pennsylvania towns.
In dollars, FEMA expects about $4.0M a year in losses across London Grove Township: $3.0M to buildings, the rest to people and crops.
Does London Grove Township flood? Rarely: 3 flood claims since 1985
Every paid claim on a federal flood insurance policy in London Grove Township, from FEMA’s records: 1.1 per 1,000 homes, fewer than 77% of the 13,809 U.S. towns with a flood insurance record.
London Grove Township isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Chester County.The storms London Grove Township remembers
None of the 21 disasters declared for Chester County shows FEMA aid or repair money reaching London Grove Township itself in FEMA’s records, so these are its biggest flood-claim years.
- 19851 flood claims paidNo declaration for the county that year
- 19991 flood claims paidThe year of Hurricane Floyd Major Disaster Declarations, declared for Chester County
- 20011 flood claims paidNo declaration for the county that year
Chester County has had 21 natural disasters declared by the President since 1953, most often severe storms, then hurricanes and tropical storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of London Grove Township after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the London Grove Township archive →London Grove Township and its neighbors
London Grove Township is 5th of the 6 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 |
|---|---|---|---|
| Londonderry Township | A+less damage than 98% | river and rain flooding | — |
| Penn Township | Aless damage than 89% | river and rain flooding | 1 |
| New Garden Township | Aless damage than 88% | river and rain flooding | 4 |
| Franklin Township | B+less damage than 70% | river and rain flooding | 2 |
| London Grove Township | Bless damage than 58% | river and rain flooding | 3 |
| Avondale | B−less damage than 50% | river and rain flooding | 43 |
| West Marlborough Township | — | 777 residents; we grade 1,000+ | |
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 London Grove Township 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.
- 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 London Grove Township
Is London Grove Township at risk for natural disasters?
On FEMA’s National Risk Index, London Grove Township has lower expected damage per building than 58% of U.S. towns: B for hazard risk, #684 of 1,037 in Pennsylvania. Most of the expected damage is river and rain flooding (88%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does London Grove Township flood?
Flood insurance has paid 3 claims in London Grove Township since 1985, $15K in all, or 1.1 per 1,000 homes, fewer than 77% of U.S. towns with a flood insurance record.
Is London Grove Township 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 Chester County, 40% of homes in mapped flood zones carry federal flood insurance, and 0.6% of all homes do.
How much is flood insurance in London Grove Township?
FEMA’s Community Rating System list shows no discount for London Grove Township’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is London Grove Township at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (88%), and London Grove Township’s rate for it is higher than 66% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in London Grove Township.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where London Grove Township’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.