STATE RISK ROLL-UP

Illinois

Across 102 counties, FEMA rates 6 elevated or higher for overall natural-hazard risk. Here's what drives it — and where it concentrates.

How the counties rate

Faible82

Modéré14

Assez élevé5

Élevé1

Dominant hazards

The hazards most often rated elevated or higher across Illinois's counties:

Vents forts — 33 counties
Conditions météorologiques hivernales — 15 counties
Tornade — 14 counties
Foudre — 12 counties

Highest-risk counties

County	FEMA composite	Score
Cook County	Très élevé	100
DuPage County	Relativement élevé	98
Will County	Relativement élevé	97
Lake County	Relativement élevé	96
Kane County	Relativement élevé	95
St. Clair County	Relativement élevé	95

State figures are a roll-up of FEMA National Risk Index county data (counts and rankings), not an official FEMA state rating. Risk is an estimate from a public model, not a guarantee — verify your specific insurance needs with a licensed professional. See the methodology.

Check a county scorecard →Build a prep checklist →← All states

FEMA National Risk Index · as of 2026-07-10