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

#CountyRiverine Flood ScoreRatingAnn. Freq.Ann. Loss
1 Wayne County
99.4
Very High 3.14 / yr $237M
2 Oakland County
97.5
High 1.07 / yr $165M
3 Macomb County
97.5
High 1.93 / yr $146M
4 Kent County
94.8
High 0.86 / yr $89M
5 Genesee County
92.6
Medium 0.93 / yr $51M
6 Saginaw County
91.4
Medium 1.25 / yr $43M
7 Washtenaw County
90.3
Medium 1.18 / yr $47M
8 Ingham County
88.5
Medium 0.39 / yr $36M
9 Ottawa County
88.0
Medium 0.68 / yr $45M
10 Monroe County
87.4
Medium 1.32 / yr $34M
11 Berrien County
86.0
Medium 0.71 / yr $27M
12 St. Clair County
85.9
Medium 1.04 / yr $29M
13 Kalamazoo County
83.1
Medium 0.50 / yr $27M
14 Bay County
81.5
Medium 0.71 / yr $21M
15 Allegan County
79.4
Medium 0.61 / yr $22M
16 Tuscola County
79.2
Medium 0.71 / yr $16M
17 Cheboygan County
77.9
Medium 0.11 / yr $13M
18 Muskegon County
77.7
Medium 0.43 / yr $17M
19 Jackson County
77.1
Medium 0.39 / yr $18M
20 Midland County
76.9
Medium 0.68 / yr $18M
21 Calhoun County
75.8
Medium 0.39 / yr $17M
22 Livingston County
74.0
Medium 0.75 / yr $27M
23 Eaton County
72.0
Low 0.43 / yr $16M
24 Roscommon County
71.9
Low 0.11 / yr $10M
25 Isabella County
71.5
Low 0.57 / yr $12M
26 Lenawee County
71.4
Low 1.00 / yr $15M
27 Lapeer County
68.4
Low 0.57 / yr $13M
28 St. Joseph County
68.1
Low 0.14 / yr $11M
29 Sanilac County
66.2
Low 0.39 / yr $9M
30 Huron County
64.1
Low 0.43 / yr $9M
31 Ionia County
63.8
Low 0.32 / yr $11M
32 Gratiot County
63.0
Low 0.36 / yr $9M
33 Mecosta County
62.8
Low 0.50 / yr $8M
34 Van Buren County
62.0
Low 0.36 / yr $9M
35 Montcalm County
61.6
Low 0.36 / yr $10M
36 Branch County
60.9
Low 0.01 / yr $8M
37 Delta County
60.4
Low 0.43 / yr $8M
38 Newaygo County
60.1
Low 0.43 / yr $8M
39 Marquette County
59.1
Low 1.11 / yr $8M
40 Barry County
58.9
Low 0.46 / yr $10M
41 Grand Traverse County
58.0
Low 0.61 / yr $10M
42 Manistee County
56.9
Low 0.43 / yr $7M
43 Hillsdale County
56.5
Low 0.18 / yr $7M
44 Cass County
55.6
Low 0.46 / yr $7M
45 Shiawassee County
55.2
Low 0.50 / yr $8M
46 Gladwin County
53.9
Low 0.39 / yr $5M
47 Emmet County
53.1
Low 0.18 / yr $8M
48 Iosco County
52.9
Low 0.18 / yr $5M
49 Clinton County
51.5
Low 0.39 / yr $11M
50 Alpena County
51.0
Low 0.07 / yr $5M
51 Clare County
50.1
Low 0.29 / yr $4M
52 Chippewa County
49.9
Low 0.21 / yr $6M
53 Wexford County
45.0
Low 0.39 / yr $5M
54 Menominee County
44.8
Low 0.36 / yr $5M
55 Mason County
44.8
Low 0.39 / yr $4M
56 Presque Isle County
44.0
Low 0.01 / yr $4M
57 Oceana County
43.6
Low 0.29 / yr $5M
58 Ogemaw County
43.1
Low 0.14 / yr $4M
59 Houghton County
43.0
Low 0.75 / yr $7M
60 Leelanau County
42.1
Low 0.25 / yr $5M
61 Alcona County
41.3
Low 0.14 / yr $4M
62 Lake County
40.6
Low 0.32 / yr $3M
63 Montmorency County
38.8
Low 0.07 / yr $3M
64 Dickinson County
38.7
Low 0.43 / yr $5M
65 Antrim County
38.6
Low 0.07 / yr $5M
66 Arenac County
37.4
Low 0.46 / yr $4M
67 Benzie County
37.2
Low 0.18 / yr $4M
68 Osceola County
36.7
Low 0.39 / yr $3M
69 Crawford County
35.5
Low 0.04 / yr $3M
70 Charlevoix County
32.3
Very Low 0.14 / yr $4M
71 Kalkaska County
31.4
Very Low 0.07 / yr $3M
72 Gogebic County
30.2
Very Low 0.57 / yr $2M
73 Mackinac County
29.7
Very Low 0.18 / yr $3M
74 Otsego County
29.0
Very Low 0.04 / yr $4M
75 Iron County
25.7
Very Low 0.43 / yr $2M
76 Oscoda County
25.5
Very Low 0.11 / yr $2M
77 Schoolcraft County
23.7
Very Low 0.04 / yr $3M
78 Alger County
22.0
Very Low 0.18 / yr $2M
79 Missaukee County
21.9
Very Low 0.11 / yr $3M
80 Luce County
15.5
Very Low 0.04 / yr $1M
81 Baraga County
13.3
Very Low 0.43 / yr $1M
82 Ontonagon County
13.0
Very Low 0.29 / yr $1M
83 Keweenaw County
5.0
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.

Other Hazards in Michigan