Michigan Risk Readiness — Hazards, Maps & Tools

MI hazard profile

Primary hazards. Ranked.

Michigan is ground zero for US lake-effect snowfall. The western Lower Peninsula averages 60-100 inches annually. The Upper Peninsula's snow belt communities — Calumet, Houghton, Ironwood — average 200+ inches. A single lake-effect band can deposit 3-4 feet in 24 hours. The I-94, I-196, and US-31 corridors along Lake Michigan close multiple times each winter. The February 2025 blizzard produced whiteout conditions across the state. Southern Michigan averages 15 tornadoes per year. The April 3, 1956 Flint-Beecher EF-5 killed 116 people — still the deadliest Michigan tornado in history. The May 2024 Portage/Kalamazoo area tornadoes caused widespread damage. The corridor from Kalamazoo to Detroit is the most active zone. Spring season (April–June) is peak. The Grand, Kalamazoo, Muskegon, and Saginaw rivers flood regularly. Detroit's combined sewer system is among the most overtaxed in the country — heavy rain events flood basements and streets across the metro. The May 2020 Midland dam failures caused catastrophic flooding and destroyed two dams after extreme rainfall.

1

Winter ice & snow storms

Ice accumulation causes prolonged power outages and road closures across the state.

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2

Tornadoes

Occur across most of the state, often embedded in severe thunderstorm lines and tropical systems.

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3

Flooding

Flash floods, river flooding, and coastal surge affect low-lying areas and river corridors.

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4

Severe thunderstorms

Damaging winds, hail, and lightning — the most frequent hazard in most US states.

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5

Severe thunderstorms

Damaging straight-line winds, large hail, and lightning — March through October.

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Official tools

Look up your address. Know your risk.

FEMA Flood Zone Lookup

Enter your address to see your flood zone designation and insurance requirements.

Source: FEMA

USGS Earthquake Map

Real-time earthquake activity and seismic hazard maps for your region.

Source: USGS

Wildfire Risk Score

Your property's wildfire exposure score based on vegetation, terrain, and proximity to wildland.

Source: USFS

River Gauges

Real-time river levels and flood stage by county.

Source: USGS WaterWatch

Drought Monitor

Weekly drought conditions by county.

Source: US Drought Monitor

Private Well Resources

Water quality guidance for households on private wells.

Source: EPA

Insurance gaps

What your homeowner's policy doesn't cover.

Standard homeowner's policies in Michigan exclude flood damage. Flood insurance through the NFIP has a 30-day waiting period — it cannot be purchased when a storm is forecast. Check your declarations page annually to confirm your coverage limits and deductibles.

Not in your standard policy

Flood damage — requires NFIP or private flood policy

Earthquake damage — requires separate endorsement

Sewer & drain backup — requires endorsement ($50–$100/yr)

Landslide / mudflow — generally excluded

Next steps

Where do you want to go next?

During an emergency

Find alerts, contacts, and shelters.

NC emergency contacts, alert signups, and real-time information.

Local Emergency

Get prepared

Run through the MI checklist.

Step-by-step actions based on the hazards that apply to Michigan.

MI Checklists