Riverine Flood Risk in Florida
All Florida counties ranked by FEMA National Risk Index riverine flood score
Riverine Flood risk — rivers and streams overflowing their banks after heavy rain or snowmelt — is rated for 67 of 67 Florida counties in FEMA's National Risk Index. Miami-Dade County carries the state's highest riverine flood score at 99.7, with $356M in expected annual riverine flood losses.
15 Florida counties are rated High or Very High for riverine flood, and expected annual losses from riverine flood total roughly $2.78B statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Riverine Flood
| # | County | Riverine Flood Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Miami-Dade County | Very High | 4.00 / yr | $356M | |
| 2 | Broward County | Very High | 2.46 / yr | $289M | |
| 3 | Palm Beach County | High | 2.07 / yr | $179M | |
| 4 | Orange County | High | 0.36 / yr | $182M | |
| 5 | Collier County | High | 1.04 / yr | $124M | |
| 6 | Hillsborough County | High | 2.14 / yr | $146M | |
| 7 | Duval County | High | 3.46 / yr | $134M | |
| 8 | Lee County | High | 1.43 / yr | $95M | |
| 9 | Pinellas County | High | 1.61 / yr | $91M | |
| 10 | Sarasota County | High | 1.18 / yr | $67M | |
| 11 | Pasco County | High | 1.75 / yr | $76M | |
| 12 | Volusia County | High | 0.71 / yr | $67M | |
| 13 | Brevard County | High | 0.68 / yr | $73M | |
| 14 | Polk County | High | 1.36 / yr | $65M | |
| 15 | Manatee County | High | 1.43 / yr | $50M | |
| 16 | Marion County | Medium | 0.96 / yr | $42M | |
| 17 | Seminole County | Medium | 0.46 / yr | $66M | |
| 18 | Lake County | Medium | 0.25 / yr | $46M | |
| 19 | Osceola County | Medium | 0.61 / yr | $52M | |
| 20 | Leon County | Medium | 1.68 / yr | $47M | |
| 21 | St. Johns County | Medium | 1.54 / yr | $51M | |
| 22 | St. Lucie County | Medium | 0.46 / yr | $33M | |
| 23 | Escambia County | Medium | 1.79 / yr | $33M | |
| 24 | Alachua County | Medium | 1.21 / yr | $35M | |
| 25 | Indian River County | Medium | 0.50 / yr | $23M | |
| 26 | Clay County | Medium | 0.64 / yr | $35M | |
| 27 | Hernando County | Medium | 0.89 / yr | $23M | |
| 28 | Charlotte County | Medium | 0.43 / yr | $19M | |
| 29 | Sumter County | Medium | 0.21 / yr | $17M | |
| 30 | Martin County | Medium | 0.57 / yr | $18M | |
| 31 | Citrus County | Medium | 0.75 / yr | $15M | |
| 32 | Okaloosa County | Medium | 1.68 / yr | $22M | |
| 33 | Okeechobee County | Medium | 0.21 / yr | $12M | |
| 34 | Flagler County | Medium | 1.25 / yr | $16M | |
| 35 | Highlands County | Medium | 0.46 / yr | $11M | |
| 36 | Putnam County | Medium | 0.64 / yr | $12M | |
| 37 | Bay County | Medium | 2.00 / yr | $17M | |
| 38 | Santa Rosa County | Medium | 1.61 / yr | $20M | |
| 39 | Walton County | Low | 1.43 / yr | $11M | |
| 40 | Columbia County | Low | 0.57 / yr | $9M | |
| 41 | Hendry County | Low | 0.25 / yr | $6M | |
| 42 | Suwannee County | Low | 0.61 / yr | $8M | |
| 43 | Jackson County | Low | 1.32 / yr | $7M | |
| 44 | Nassau County | Low | 0.57 / yr | $10M | |
| 45 | Gadsden County | Low | 0.46 / yr | $5M | |
| 46 | Levy County | Low | 0.29 / yr | $4M | |
| 47 | DeSoto County | Low | 1.07 / yr | $4M | |
| 48 | Taylor County | Low | 0.68 / yr | $4M | |
| 49 | Glades County | Low | 0.50 / yr | $3M | |
| 50 | Monroe County | Low | 0.54 / yr | $5M | |
| 51 | Washington County | Low | 1.11 / yr | $4M | |
| 52 | Wakulla County | Very Low | 0.64 / yr | $5M | |
| 53 | Madison County | Very Low | 0.50 / yr | $3M | |
| 54 | Calhoun County | Very Low | 0.57 / yr | $3M | |
| 55 | Gilchrist County | Very Low | 0.14 / yr | $3M | |
| 56 | Bradford County | Very Low | 0.43 / yr | $3M | |
| 57 | Dixie County | Very Low | 0.50 / yr | $3M | |
| 58 | Jefferson County | Very Low | 0.39 / yr | $2M | |
| 59 | Holmes County | Very Low | 1.00 / yr | $3M | |
| 60 | Hardee County | Very Low | 0.79 / yr | $3M | |
| 61 | Hamilton County | Very Low | 0.36 / yr | $2M | |
| 62 | Gulf County | Very Low | 0.46 / yr | $2M | |
| 63 | Baker County | Very Low | 0.61 / yr | $3M | |
| 64 | Franklin County | Very Low | 0.29 / yr | $2M | |
| 65 | Lafayette County | Very Low | 0.50 / yr | $2M | |
| 66 | Union County | Very Low | 0.25 / yr | $1M | |
| 67 | Liberty County | Very Low | 0.14 / yr | $1M |
67 Florida counties with measurable riverine flood risk. See the national riverine flood ranking or all Florida counties by overall risk.
Frequently Asked Questions
Which Florida county has the highest riverine flood risk?
Miami-Dade County has the highest FEMA riverine flood risk score in Florida at 99.7 (Very High), with $356M in expected annual losses and about 4.00 events per year.
How many Florida counties face significant riverine flood risk?
67 Florida counties record measurable riverine flood risk in FEMA's National Risk Index; 15 of them are rated High or Very High.