Highest flood-risk US counties

Counties with the highest FEMA inland-flooding risk. Ratings from FEMA's National Risk Index.

1. 1Los Angeles County, CAVery High
2. 2Cook County, ILVery High
3. 3Harris County, TXVery High
4. 4Riverside County, CAVery High
5. 5Maricopa County, AZVery High
6. 6San Bernardino County, CAVery High
7. 7Orange County, CAVery High
8. 8Alameda County, CAVery High
9. 9Santa Clara County, CAVery High
10. 10San Diego County, CAVery High
11. 11King County, WAVery High
12. 12Dallas County, TXVery High
13. 13Miami-Dade County, FLVery High
14. 14Philadelphia County, PAVery High
15. 15Clark County, NVVery High
16. 16Contra Costa County, CAVery High
17. 17Broward County, FLVery High
18. 18Bexar County, TXVery High
19. 19Ventura County, CAVery High
20. 20Kings County, NYVery High
21. 21Queens County, NYVery High
22. 22Pima County, AZVery High
23. 23Wayne County, MIVery High
24. 24New York County, NYVery High
25. 25Honolulu County, HIVery High
26. 26Allegheny County, PAVery High
27. 27San Francisco County, CARelatively High
28. 28Shelby County, TNRelatively High
29. 29St. Louis County, MORelatively High
30. 30Fresno County, CARelatively High
31. 31San Mateo County, CARelatively High
32. 32Palm Beach County, FLRelatively High
33. 33Tarrant County, TXRelatively High
34. 34Sonoma County, CARelatively High
35. 35Lee County, FLRelatively High
36. 36Hidalgo County, TXRelatively High
37. 37Santa Barbara County, CARelatively High
38. 38Collier County, FLRelatively High
39. 39Kern County, CARelatively High
40. 40Collin County, TXRelatively High
41. 41Hillsborough County, FLRelatively High
42. 42Monterey County, CARelatively High
43. 43St. Louis city, MORelatively High
44. 44Jefferson Parish, LARelatively High
45. 45San Joaquin County, CARelatively High
46. 46Pierce County, WARelatively High
47. 47Hawaii County, HIRelatively High
48. 48Multnomah County, ORRelatively High
49. 49Orange County, FLRelatively High
50. 50Brevard County, FLRelatively High

Source: FEMA National Risk Index. Risk ratings reflect expected annual loss from the hazard, not a forecast. See each county page for its full hazard profile + a decade of outage history.