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Natural hazards · Ridley

Ridley, PA natural hazards

Most of the natural-hazard damage FEMA expects in Ridley comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 85 claims here since 1978.

FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarations
Expected damage

How exposed is Ridley?

23
Low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Ridley to be higher than in 23% of U.S. communities, mostly from inland flooding.

Inland flooding55%Heat waves10%Earthquakes9%Cold waves7%Tornadoes7%Everything else12%
By hazard

What Ridley faces

Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.

Inland flooding

55% of expected damage
Below average · higher than 38% of U.S. places
Recorded about 5 times a year in the area

Heat waves

10% of expected damage
Well below average · higher than 16% of U.S. places
Recorded about 11 times a year in the area

Earthquakes

9% of expected damage
Above average · higher than 70% of U.S. places

Cold waves

7% of expected damage
Below average · higher than 37% of U.S. places
Recorded about once a year in the area

Tornadoes

7% of expected damage
Above average · higher than 50% of U.S. places

Lower here

Coastal floodingHurricanesHailIce stormsWinter weatherWildfireLandslidesStrong windLightning

Not a risk here

DroughtAvalanchesTsunamisVolcanic activity
Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.
Flood insurance claims

Does Ridley flood?

Every paid claim on a federal flood insurance policy in Ridley, from FEMA’s records.

85paid claims since 1978
$1.6Mpaid to owners
16homes flooded more than once
19782026

Biggest named events

  • Hurricane Isaias: 16 claims, $422K
  • Tropical Storm Allison: 10 claims, $166K
  • Hurricane Irene: 6 claims, $214K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (1) ■ flooded 2+ times

of homes in flood zones
are insured
of all homes
are insured
No community discount. Ridley isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Delaware County.
Disasters that hit Ridley

Federal disasters declared here

None of the disasters declared for Delaware County shows FEMA aid or repair money reaching Ridley itself in FEMA’s records.

Brought FEMA money into RidleyDeclared for Delaware County only
Delaware County has had 20 natural disasters declared since 1953, most often hurricanes and floods.
Around Ridley

Ridley and the towns around it

Ridley Park: Very low, mostly inland floodingEddystone: Moderate, mostly inland floodingProspect Park: Low, mostly inland floodingNether Providence: Very low, mostly inland floodingRutledge: Low, mostly inland floodingChester: Low, mostly inland floodingDarby: Very low, mostly inland floodingSwarthmore: Very low, mostly inland floodingSpringfield: Very low, mostly inland floodingTinicum: Moderate, mostly inland floodingUpper Darby: Low, mostly inland floodingMorton: Very low, mostly inland floodingGreenwich: Very high, mostly inland floodingNorwood: Low, mostly inland floodingRose Valley: Low, mostly inland floodingBrookhaven: Moderate, mostly inland floodingUpper Providence: Very low, mostly inland floodingMedia: Very low, mostly inland floodingMarple: Very low, mostly inland floodingChester: High, mostly inland floodingUpland: Moderate, mostly inland floodingTrainer: Very low, mostly inland floodingLogan: Moderate, mostly inland floodingParkside: Low, mostly inland floodingUpper Chichester: Very low, mostly inland floodingPhiladelphia: Moderate, mostly inland floodingSharon Hill: Very low, mostly inland floodingFolcroft: Very low, mostly inland floodingCollingdale: Very low, mostly inland floodingGlenolden: Very low, mostly inland floodingColwyn: Moderate, mostly inland floodingHaverford: Very low, mostly inland floodingPaulsboro: High, mostly inland floodingWest Deptford: Low, mostly inland floodingClifton Heights: Very low, mostly inland floodingLansdowne: Low, mostly inland floodingAldan: Very low, mostly inland floodingYeadon: Low, mostly inland floodingMillbourne: Low, mostly inland floodingDarby: Moderate, mostly inland floodingRidley: Low, mostly inland flooding RidleyRidley ParkEddystoneProspect ParkNether ProvidenceRutledgeChesterDarbySwarthmoreSpringfieldTinicumUpper DarbyMorton
Very lowLowModerateHighVery high
Tinicummostly inland floodingModerate
Eddystonemostly inland floodingModerate
Prospect Parkmostly inland floodingLow
Upper Darbymostly inland floodingLow
Chestermostly inland floodingLow
Rutledgemostly inland floodingLow
Ridleymostly inland floodingLow
Nether Providencemostly inland floodingVery low
Swarthmoremostly inland floodingVery low
Darbymostly inland floodingVery low
Ridley Parkmostly inland floodingVery low
Springfieldmostly inland floodingVery low
Mortonmostly inland floodingVery low
About these numbers

How to read this page

An average, not a forecastFEMA’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 here, so a big city isn’t rated riskier just for having more buildings. Ridley covers 7 census tracts, combined by population.
Money that reached townFlood claims are matched to Ridley’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Township of Ridley. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across Ridley total about $7.0M a year, counting buildings, people and crops.

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.

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You’re in Ridley, PADelaware CountyView boundary

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/15 · 2025-01-01
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