Natural Hazard Risk in Iowa
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 |
|---|---|---|---|---|
| Polk | 92 | Relatively Moderate | $137.6M | 492,316 |
| Johnson | 87.4 | Relatively Moderate | $96.3M | 152,809 |
| Linn | 86.7 | Relatively Moderate | $79.1M | 230,253 |
| Scott | 84.9 | Relatively Moderate | $66.5M | 174,636 |
| Woodbury | 83.3 | Relatively Moderate | $50.7M | 105,853 |
| Pottawattamie | 80.4 | Relatively Low | $49.6M | 93,646 |
| Black Hawk | 76.6 | Relatively Low | $41.8M | 131,044 |
| Cerro Gordo | 69.6 | Relatively Low | $27.4M | 43,117 |
| Story | 68.8 | Relatively Low | $36.1M | 98,533 |
| Wapello | 65.3 | Relatively Low | $24.1M | 35,423 |
| Clinton | 64.8 | Relatively Low | $25.4M | 46,429 |
| Dubuque | 63.6 | Relatively Low | $41.7M | 99,148 |
| Lee | 62.9 | Relatively Low | $22.6M | 33,538 |
| Marshall | 62.5 | Relatively Low | $22.7M | 40,092 |
| Crawford | 60.8 | Relatively Low | $23.6M | 16,525 |
| Dallas | 60.6 | Relatively Low | $39.7M | 99,673 |
| Cass | 60.1 | Relatively Low | $16.6M | 13,124 |
| Webster | 60 | Relatively Low | $24.7M | 36,988 |
| Hardin | 58.4 | Relatively Low | $20.4M | 16,876 |
| Muscatine | 57.8 | Relatively Low | $20.3M | 43,233 |
| Carroll | 57.6 | Relatively Low | $22.7M | 20,756 |
| Des Moines | 55.8 | Relatively Low | $19.5M | 38,895 |
| Sioux | 52.4 | Relatively Low | $29.8M | 35,872 |
| Fayette | 50.9 | Relatively Low | $14.9M | 19,509 |
| Davis | 50.3 | Relatively Low | $11.2M | 9,094 |
| Delaware | 49.7 | Relatively Low | $17.1M | 17,486 |
| Union | 49.5 | Relatively Low | $12.5M | 12,125 |
| Adair | 49.5 | Relatively Low | $14.2M | 7,418 |
| Plymouth | 49.2 | Relatively Low | $17.6M | 25,687 |
| Floyd | 47.7 | Relatively Low | $14.6M | 15,615 |
| Tama | 45.3 | Relatively Low | $12.6M | 17,081 |
| Calhoun | 44.6 | Relatively Low | $13.3M | 9,927 |
| Washington | 44.2 | Relatively Low | $13.9M | 22,565 |
| Jasper | 43.7 | Relatively Low | $16.1M | 37,808 |
| Hamilton | 42.9 | Relatively Low | $15.5M | 15,039 |
| Emmet | 42.7 | Very Low | $14.1M | 9,388 |
| Clayton | 42.2 | Very Low | $14.5M | 17,028 |
| Wright | 41.5 | Very Low | $13M | 12,937 |
| Appanoose | 41.2 | Very Low | $10.3M | 12,311 |
| Page | 40.2 | Very Low | $12.1M | 15,202 |
| Buena Vista | 39.3 | Very Low | $12M | 20,823 |
| Audubon | 38.6 | Very Low | $11.5M | 5,674 |
| Taylor | 38.5 | Very Low | $9.9M | 5,889 |
| Allamakee | 38.2 | Very Low | $10.4M | 14,052 |
| Mitchell | 37.7 | Very Low | $14.4M | 10,556 |
| Clay | 36.4 | Very Low | $17.1M | 16,377 |
| Dickinson | 36.3 | Very Low | $14.4M | 17,612 |
| Winneshiek | 36.2 | Very Low | $15.2M | 20,051 |
| Warren | 36.1 | Very Low | $18.7M | 52,398 |
| Jackson | 36.1 | Very Low | $14.1M | 19,475 |
| Madison | 35.5 | Very Low | $10.3M | 16,548 |
| Marion | 34.4 | Very Low | $14.2M | 33,404 |
| Cherokee | 34.1 | Very Low | $10.7M | 11,649 |
| Montgomery | 33.7 | Very Low | $11.2M | 10,330 |
| Van Buren | 33.6 | Very Low | $8.4M | 7,203 |
| Pocahontas | 33 | Very Low | $11.3M | 7,078 |
| Jones | 32.7 | Very Low | $16.1M | 20,631 |
| Kossuth | 32.3 | Very Low | $15.7M | 14,815 |
| Greene | 31.8 | Very Low | $12.2M | 8,769 |
| Chickasaw | 31.7 | Very Low | $10.9M | 12,002 |
| Harrison | 31.3 | Very Low | $9.8M | 14,559 |
| Poweshiek | 31.3 | Very Low | $11.8M | 18,662 |
| Henry | 30.9 | Very Low | $9.7M | 20,465 |
| Winnebago | 30.7 | Very Low | $9.6M | 10,679 |
| Mahaska | 29.7 | Very Low | $11.1M | 22,167 |
| Lucas | 29.7 | Very Low | $7.9M | 8,623 |
| Benton | 28.8 | Very Low | $15.7M | 25,558 |
| Hancock | 28.8 | Very Low | $11.2M | 10,795 |
| Boone | 28.4 | Very Low | $16.5M | 26,715 |
| Iowa | 28.2 | Very Low | $11.1M | 16,661 |
| Sac | 27.3 | Very Low | $14.7M | 9,814 |
| Butler | 27.1 | Very Low | $14.5M | 14,334 |
| Jefferson | 27.1 | Very Low | $7.5M | 15,635 |
| Guthrie | 26.5 | Very Low | $13.9M | 10,623 |
| Monona | 25.1 | Very Low | $8.7M | 8,738 |
| Bremer | 24.6 | Very Low | $15.3M | 24,970 |
| Humboldt | 24.1 | Very Low | $9.7M | 9,597 |
| Buchanan | 24 | Very Low | $13.1M | 20,565 |
| Decatur | 23.6 | Very Low | $7.8M | 7,645 |
| Shelby | 22.8 | Very Low | $12.6M | 11,738 |
| Wayne | 22 | Very Low | $5.9M | 6,492 |
| Franklin | 21.9 | Very Low | $10.8M | 10,019 |
| Keokuk | 21.9 | Very Low | $8.9M | 10,033 |
| Cedar | 21.5 | Very Low | $12.5M | 18,505 |
| Adams | 20.4 | Very Low | $8M | 3,704 |
| Lyon | 19.2 | Very Low | $10.9M | 11,934 |
| Mills | 18.5 | Very Low | $10.6M | 14,475 |
| Clarke | 18.4 | Very Low | $9.9M | 9,747 |
| Ida | 18.4 | Very Low | $7.3M | 7,001 |
| Louisa | 17.5 | Very Low | $8.4M | 10,837 |
| O'Brien | 16.4 | Very Low | $11.1M | 14,182 |
| Howard | 15.6 | Very Low | $9.2M | 9,449 |
| Palo Alto | 15.5 | Very Low | $9.7M | 8,984 |
| Fremont | 15 | Very Low | $6.7M | 6,605 |
| Osceola | 14.9 | Very Low | $5.5M | 6,192 |
| Ringgold | 14.2 | Very Low | $8.1M | 4,653 |
| Grundy | 13.1 | Very Low | $9.5M | 12,329 |
| Monroe | 10.3 | Very Low | $7M | 7,577 |
| Worth | 9.9 | Very Low | $7M | 7,443 |
🏛️ Federal disaster declarations (last 2 years)
DRSEVERE WINTER STORMMay 21, 2025
Winter Storm · Designated areas: Crawford (County), Harrison (County), Monona (County), Woodbury (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.