Michigan coastal flooding risk
Wayne County has the highest coastal flooding risk in Michigan, scoring 49.6 out of 100 — rated "Relatively Low" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Wayne County | 49.6 | Relatively Low |
| 2 | Macomb County | 46.6 | Relatively Low |
| 3 | St. Clair County | 46.2 | Relatively Low |
| 4 | Monroe County | 46 | Relatively Low |
| 5 | Bay County | 45.8 | Relatively Low |
| 6 | Chippewa County | 44.2 | Relatively Low |
| 7 | Huron County | 43.2 | Very Low |
| 8 | Iosco County | 41.4 | Very Low |
| 9 | Arenac County | 39.2 | Very Low |
| 10 | Berrien County | 38.8 | Very Low |
| 11 | Menominee County | 37.6 | Very Low |
| 12 | Cheboygan County | 37.2 | Very Low |
| 13 | Leelanau County | 37 | Very Low |
| 14 | Mackinac County | 36.8 | Very Low |
| 15 | Delta County | 36.6 | Very Low |
| 16 | Alpena County | 36 | Very Low |
| 17 | Ottawa County | 35.2 | Very Low |
| 18 | Marquette County | 34.6 | Very Low |
| 19 | Muskegon County | 34.2 | Very Low |
| 20 | Mason County | 32.8 | Very Low |
| 21 | Grand Traverse County | 32.6 | Very Low |
| 22 | Tuscola County | 32.4 | Very Low |
| 23 | Emmet County | 31.4 | Very Low |
| 24 | Alcona County | 30 | Very Low |
| 25 | Baraga County | 29.6 | Very Low |
| 26 | Allegan County | 28.2 | Very Low |
| 27 | Manistee County | 27.6 | Very Low |
| 28 | Benzie County | 27.2 | Very Low |
| 29 | Oceana County | 26.8 | Very Low |
| 30 | Sanilac County | 26.6 | Very Low |
| 31 | Charlevoix County | 26.4 | Very Low |
| 32 | Van Buren County | 23.8 | Very Low |
| 33 | Antrim County | 15.6 | Very Low |
| 34 | Alger County | 15.4 | Very Low |
| 35 | Presque Isle County | 15.2 | Very Low |
| 36 | Ontonagon County | 15 | Very Low |
| 37 | Keweenaw County | 14.8 | Very Low |
| 38 | Schoolcraft County | 14.2 | Very Low |
| 39 | Houghton County | 14 | Very Low |
| 40 | Gogebic County | 13.4 | Very Low |
| 41 | Luce County | 13.2 | Very Low |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Coastal Flooding risk nationally:
Other hazard risks in Michigan:
Frequently asked questions
What is the highest coastal flooding risk county in Michigan?
Wayne County, MI has the highest coastal flooding risk in Michigan, with a FEMA National Risk Index score of 49.6 out of 100 (rated "Relatively Low").
What causes coastal flooding risk in Michigan?
Coastal flooding scores cover storm surge, wave action, and tidal flooding along the Gulf, Atlantic, and Pacific coasts, and Great Lakes shoreline. Inland flooding is scored separately. Counties with "Not Applicable" ratings have no significant coastal exposure. Coastal flood events are reported at zone level in NOAA Storm Events and are not included in county-level counts.