Natural Hazard Risk in Pennsylvania
The risk score (0–100) combines expected annual loss from 18 natural hazards with social vulnerability and community resilience. Higher = greater relative risk. Scores compare counties across the United States.
See what's happening right now on the live map →| County | Risk score | Rating | Expected annual loss | Population |
|---|---|---|---|---|
| Philadelphia | 99.6 | Very High | $667.1M | 1,602,305 |
| Allegheny | 98.1 | Relatively High | $354.2M | 1,249,907 |
| Montgomery | 96.8 | Relatively High | $296.7M | 856,020 |
| Lancaster | 95 | Relatively High | $170M | 552,633 |
| Bucks | 94.8 | Relatively High | $202.6M | 646,216 |
| Lehigh | 93.9 | Relatively Moderate | $128.3M | 373,891 |
| Delaware | 92.9 | Relatively Moderate | $134.9M | 576,366 |
| Berks | 92.7 | Relatively Moderate | $119.5M | 428,624 |
| Chester | 91.9 | Relatively Moderate | $172.6M | 534,152 |
| Luzerne | 91.6 | Relatively Moderate | $88M | 325,461 |
| Dauphin | 91.1 | Relatively Moderate | $99.8M | 286,115 |
| York | 90.4 | Relatively Moderate | $106M | 456,310 |
| Northampton | 90 | Relatively Moderate | $90.4M | 312,822 |
| Lackawanna | 89.9 | Relatively Moderate | $72.4M | 215,724 |
| Westmoreland | 87.8 | Relatively Moderate | $76.3M | 354,424 |
| Cumberland | 86.2 | Relatively Moderate | $68.7M | 259,125 |
| Schuylkill | 85.3 | Relatively Moderate | $48.9M | 142,966 |
| Monroe | 85.1 | Relatively Moderate | $56.9M | 168,181 |
| Erie | 84.1 | Relatively Moderate | $47.6M | 270,695 |
| Washington | 83.1 | Relatively Moderate | $57.4M | 209,274 |
| Fayette | 82.2 | Relatively Moderate | $37.1M | 128,759 |
| Lebanon | 79.9 | Relatively Low | $43.2M | 143,188 |
| Lycoming | 79.6 | Relatively Low | $40.9M | 114,105 |
| Butler | 79.3 | Relatively Low | $47.7M | 193,593 |
| Northumberland | 79.2 | Relatively Low | $37.3M | 91,636 |
| Mercer | 77.7 | Relatively Low | $34.1M | 110,623 |
| Blair | 77.7 | Relatively Low | $33.9M | 122,666 |
| Cambria | 76.4 | Relatively Low | $31.6M | 133,467 |
| Franklin | 76.4 | Relatively Low | $37.7M | 155,896 |
| Crawford | 76 | Relatively Low | $26.8M | 83,927 |
| Beaver | 75.3 | Relatively Low | $35.5M | 168,155 |
| Bradford | 73.1 | Relatively Low | $32.2M | 59,840 |
| Armstrong | 69.3 | Relatively Low | $27.8M | 65,530 |
| Mifflin | 69.3 | Relatively Low | $18.4M | 46,143 |
| Bedford | 68.2 | Relatively Low | $24.2M | 47,550 |
| Centre | 68 | Relatively Low | $24.9M | 158,157 |
| Adams | 67.5 | Relatively Low | $27.2M | 103,797 |
| Clearfield | 67.1 | Relatively Low | $22.3M | 80,509 |
| Lawrence | 66.1 | Relatively Low | $24.6M | 86,035 |
| Pike | 65.9 | Relatively Low | $24.5M | 58,432 |
| Warren | 65.6 | Relatively Low | $23.1M | 38,587 |
| Somerset | 64.2 | Relatively Low | $21.9M | 74,099 |
| Indiana | 63.7 | Relatively Low | $18.7M | 83,148 |
| Columbia | 62.1 | Relatively Low | $24.4M | 64,676 |
| Tioga | 59.8 | Relatively Low | $18.6M | 41,034 |
| Carbon | 59.4 | Relatively Low | $21.6M | 64,728 |
| Jefferson | 57.9 | Relatively Low | $14M | 44,472 |
| Wayne | 56.3 | Relatively Low | $17.2M | 51,146 |
| Venango | 55.6 | Relatively Low | $15.8M | 50,453 |
| Union | 55.2 | Relatively Low | $14.4M | 42,665 |
| Greene | 55.1 | Relatively Low | $17M | 35,904 |
| Snyder | 54.3 | Relatively Low | $15M | 39,723 |
| McKean | 53.8 | Relatively Low | $15M | 40,379 |
| Susquehanna | 53.6 | Relatively Low | $17.9M | 38,411 |
| Perry | 53.1 | Relatively Low | $18.2M | 45,809 |
| Clinton | 51.8 | Relatively Low | $13.8M | 37,434 |
| Huntingdon | 50.3 | Relatively Low | $15.5M | 44,088 |
| Elk | 45.2 | Relatively Low | $15.5M | 30,973 |
| Wyoming | 44.8 | Relatively Low | $13.5M | 26,048 |
| Juniata | 38.8 | Very Low | $8.8M | 23,482 |
| Clarion | 30 | Very Low | $8.7M | 37,191 |
| Potter | 28.1 | Very Low | $7.7M | 16,396 |
| Forest | 19.9 | Very Low | $5M | 6,973 |
| Montour | 14.7 | Very Low | $5.5M | 18,104 |
| Cameron | 12.6 | Very Low | $4.2M | 4,535 |
| Sullivan | 10.7 | Very Low | $4.1M | 5,840 |
| Fulton | 7.8 | Very Low | $4.1M | 14,556 |
🏛️ Federal disaster declarations (last 2 years)
DRTROPICAL STORM DEBBYSep 11, 2024
Tropical Storm · Designated areas: Cambria (County), Cameron (County), Clearfield (County), Elk (County), Indiana (County), Sullivan (County), Susquehanna (County), Wayne (County), Wyoming (County), Lycoming (County), Potter (County), Tioga (County)…
Major disaster (DR) and emergency (EM) declarations unlock federal assistance for the designated areas. Source: FEMA / OpenFEMA.
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Data: FEMA National Risk Index (updated ~annually). AlertAtlas is not an official warning service — always follow local authorities.