Riverine Flood Risk in Michigan
All Michigan 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 83 of 83 Michigan counties in FEMA's National Risk Index. Wayne County carries the state's highest riverine flood score at 99.4, with $237M in expected annual riverine flood losses.
4 Michigan counties are rated High or Very High for riverine flood, and expected annual losses from riverine flood total roughly $1.52B 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 | Wayne County | Very High | 3.14 / yr | $237M | |
| 2 | Oakland County | High | 1.07 / yr | $165M | |
| 3 | Macomb County | High | 1.93 / yr | $146M | |
| 4 | Kent County | High | 0.86 / yr | $89M | |
| 5 | Genesee County | Medium | 0.93 / yr | $51M | |
| 6 | Saginaw County | Medium | 1.25 / yr | $43M | |
| 7 | Washtenaw County | Medium | 1.18 / yr | $47M | |
| 8 | Ingham County | Medium | 0.39 / yr | $36M | |
| 9 | Ottawa County | Medium | 0.68 / yr | $45M | |
| 10 | Monroe County | Medium | 1.32 / yr | $34M | |
| 11 | Berrien County | Medium | 0.71 / yr | $27M | |
| 12 | St. Clair County | Medium | 1.04 / yr | $29M | |
| 13 | Kalamazoo County | Medium | 0.50 / yr | $27M | |
| 14 | Bay County | Medium | 0.71 / yr | $21M | |
| 15 | Allegan County | Medium | 0.61 / yr | $22M | |
| 16 | Tuscola County | Medium | 0.71 / yr | $16M | |
| 17 | Cheboygan County | Medium | 0.11 / yr | $13M | |
| 18 | Muskegon County | Medium | 0.43 / yr | $17M | |
| 19 | Jackson County | Medium | 0.39 / yr | $18M | |
| 20 | Midland County | Medium | 0.68 / yr | $18M | |
| 21 | Calhoun County | Medium | 0.39 / yr | $17M | |
| 22 | Livingston County | Medium | 0.75 / yr | $27M | |
| 23 | Eaton County | Low | 0.43 / yr | $16M | |
| 24 | Roscommon County | Low | 0.11 / yr | $10M | |
| 25 | Isabella County | Low | 0.57 / yr | $12M | |
| 26 | Lenawee County | Low | 1.00 / yr | $15M | |
| 27 | Lapeer County | Low | 0.57 / yr | $13M | |
| 28 | St. Joseph County | Low | 0.14 / yr | $11M | |
| 29 | Sanilac County | Low | 0.39 / yr | $9M | |
| 30 | Huron County | Low | 0.43 / yr | $9M | |
| 31 | Ionia County | Low | 0.32 / yr | $11M | |
| 32 | Gratiot County | Low | 0.36 / yr | $9M | |
| 33 | Mecosta County | Low | 0.50 / yr | $8M | |
| 34 | Van Buren County | Low | 0.36 / yr | $9M | |
| 35 | Montcalm County | Low | 0.36 / yr | $10M | |
| 36 | Branch County | Low | 0.01 / yr | $8M | |
| 37 | Delta County | Low | 0.43 / yr | $8M | |
| 38 | Newaygo County | Low | 0.43 / yr | $8M | |
| 39 | Marquette County | Low | 1.11 / yr | $8M | |
| 40 | Barry County | Low | 0.46 / yr | $10M | |
| 41 | Grand Traverse County | Low | 0.61 / yr | $10M | |
| 42 | Manistee County | Low | 0.43 / yr | $7M | |
| 43 | Hillsdale County | Low | 0.18 / yr | $7M | |
| 44 | Cass County | Low | 0.46 / yr | $7M | |
| 45 | Shiawassee County | Low | 0.50 / yr | $8M | |
| 46 | Gladwin County | Low | 0.39 / yr | $5M | |
| 47 | Emmet County | Low | 0.18 / yr | $8M | |
| 48 | Iosco County | Low | 0.18 / yr | $5M | |
| 49 | Clinton County | Low | 0.39 / yr | $11M | |
| 50 | Alpena County | Low | 0.07 / yr | $5M | |
| 51 | Clare County | Low | 0.29 / yr | $4M | |
| 52 | Chippewa County | Low | 0.21 / yr | $6M | |
| 53 | Wexford County | Low | 0.39 / yr | $5M | |
| 54 | Menominee County | Low | 0.36 / yr | $5M | |
| 55 | Mason County | Low | 0.39 / yr | $4M | |
| 56 | Presque Isle County | Low | 0.01 / yr | $4M | |
| 57 | Oceana County | Low | 0.29 / yr | $5M | |
| 58 | Ogemaw County | Low | 0.14 / yr | $4M | |
| 59 | Houghton County | Low | 0.75 / yr | $7M | |
| 60 | Leelanau County | Low | 0.25 / yr | $5M | |
| 61 | Alcona County | Low | 0.14 / yr | $4M | |
| 62 | Lake County | Low | 0.32 / yr | $3M | |
| 63 | Montmorency County | Low | 0.07 / yr | $3M | |
| 64 | Dickinson County | Low | 0.43 / yr | $5M | |
| 65 | Antrim County | Low | 0.07 / yr | $5M | |
| 66 | Arenac County | Low | 0.46 / yr | $4M | |
| 67 | Benzie County | Low | 0.18 / yr | $4M | |
| 68 | Osceola County | Low | 0.39 / yr | $3M | |
| 69 | Crawford County | Low | 0.04 / yr | $3M | |
| 70 | Charlevoix County | Very Low | 0.14 / yr | $4M | |
| 71 | Kalkaska County | Very Low | 0.07 / yr | $3M | |
| 72 | Gogebic County | Very Low | 0.57 / yr | $2M | |
| 73 | Mackinac County | Very Low | 0.18 / yr | $3M | |
| 74 | Otsego County | Very Low | 0.04 / yr | $4M | |
| 75 | Iron County | Very Low | 0.43 / yr | $2M | |
| 76 | Oscoda County | Very Low | 0.11 / yr | $2M | |
| 77 | Schoolcraft County | Very Low | 0.04 / yr | $3M | |
| 78 | Alger County | Very Low | 0.18 / yr | $2M | |
| 79 | Missaukee County | Very Low | 0.11 / yr | $3M | |
| 80 | Luce County | Very Low | 0.04 / yr | $1M | |
| 81 | Baraga County | Very Low | 0.43 / yr | $1M | |
| 82 | Ontonagon County | Very Low | 0.29 / yr | $1M | |
| 83 | Keweenaw County | Very Low | 0.25 / yr | $475K |
83 Michigan counties with measurable riverine flood risk. See the national riverine flood ranking or all Michigan counties by overall risk.
Frequently Asked Questions
Which Michigan county has the highest riverine flood risk?
Wayne County has the highest FEMA riverine flood risk score in Michigan at 99.4 (Very High), with $237M in expected annual losses and about 3.14 events per year.
How many Michigan counties face significant riverine flood risk?
83 Michigan counties record measurable riverine flood risk in FEMA's National Risk Index; 4 of them are rated High or Very High.