Photo: Choess · CC BY-SA 3.0On FEMA’s figures, London Britain Township faces more hazard damage per building than 65% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, London Britain Township gets a C for hazard risk: higher expected damage per building than 65% of U.S. towns, #884 of 1,037 in Pennsylvania. Most of that expected damage is river and rain flooding (92%). Flood insurance has paid 1 claim here since 2010.
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 Britain 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 Britain Township’s grade
River and rain flooding is 92% of the building damage FEMA expects in London Britain Township, and London Britain Township’s rate of river and rain flooding damage is higher than 82% of U.S. census tracts.
C #884 of 1,037 in Pennsylvania; higher expected damage per building than 65% of U.S. towns (21,298).
All of London Britain Township’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, London Britain Township has more expected damage per building than 85% of Pennsylvania towns.
In dollars, FEMA expects about $2.0M a year in losses across London Britain Township: $1.6M to buildings, the rest to people and crops.
Does London Britain Township flood? Rarely: 1 flood claim since 2010
Every paid claim on a federal flood insurance policy in London Britain Township, from FEMA’s records: 0.9 per 1,000 homes, fewer than 80% of the 13,809 U.S. towns with a flood insurance record.
London Britain 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 Britain Township remembers
None of the 21 disasters declared for Chester County shows FEMA aid or repair money reaching London Britain Township itself in FEMA’s records, so these are its biggest flood-claim years.
- 20101 flood claims paidThe year of Severe Winter Storms and Snowstorms, declared for Chester County
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 Britain Township after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the London Britain Township archive →London Britain Township and its neighbors
London Britain Township is 4th 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 |
|---|---|---|---|
| New Garden Township | Aless damage than 88% | river and rain flooding | 4 |
| Franklin Township | B+less damage than 70% | river and rain flooding | 2 |
| North Star | B+less damage than 70% | river and rain flooding | 1 |
| London Britain Township | Cmore damage than 65% | river and rain flooding | 1 |
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 Britain 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 Britain Township
Is London Britain Township at risk for natural disasters?
On FEMA’s National Risk Index, London Britain Township has higher expected damage per building than 65% of U.S. towns: C for hazard risk, #884 of 1,037 in Pennsylvania. Most of the expected damage is river and rain flooding (92%). 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 London Britain Township flood?
Flood insurance has paid 1 claim in London Britain Township since 2010, $3K in all, or 0.9 per 1,000 homes, fewer than 80% of U.S. towns with a flood insurance record.
Is London Britain 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 Britain Township?
FEMA’s Community Rating System list shows no discount for London Britain Township’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is London Britain Township at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (92%), and London Britain Township’s rate for it is higher than 82% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in London Britain Township.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where London Britain 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.