IL
Illinois
Comprehensive climate risk and disaster history profile
88
Billion-Dollar Events
$34.8B
Total Economic Impact
102
Counties
52.47
Avg Risk Score
Top Natural Hazards
Based on FEMA National Risk Index data across all 102 counties
Heat Wave
76.01
Avg Risk Score
ERQK
73.13
Avg Risk Score
Strong Wind
69.0
Avg Risk Score
Drought
68.24
Avg Risk Score
Freeze
65.9
Avg Risk Score
Hail
61.15
Avg Risk Score
Disaster Type Breakdown
Historical billion-dollar events by category (1980-2024)
Severe Storm
67 events
$24.0B
Winter Storm
8 events
$2.4B
Drought
7 events
$4.7B
Flooding
5 events
$3.5B
Freeze
1 events
$0.1B
Disaster Trends by Decade
How disaster frequency and costs have changed over time
Highest Risk Counties
Counties with the highest overall risk scores based on FEMA NRI
| Rank | County | Risk Score | Risk Rating | SVI Percentile |
|---|---|---|---|---|
| 1 | Cook | 99.62 | 8004.0% | |
| 2 | DuPage | 94.94 | 2199.0% | |
| 3 | Lake | 93.73 | 4663.0% | |
| 4 | Will | 93.48 | 2412.0% | |
| 5 | St. Clair | 93.25 | 5544.0% | |
| 6 | Madison | 92.49 | 2581.0% | |
| 7 | Winnebago | 90.45 | 7629.0% | |
| 8 | Kane | 90.04 | 4940.0% | |
| 9 | Sangamon | 88.55 | 4303.0% | |
| 10 | McHenry | 85.71 | 1152.0% |
Recent Major Events
Most costly billion-dollar disasters in the past 10 years
Severe Storm
Jun 2025
$1.4B
3 fatalities
Severe Storm
Mar 2025
$0.3B
1 fatalities
Severe Storm
Mar 2025
$1.7B
7 fatalities
Severe Storm
Jul 2024
$0.5B
Severe Storm
May 2024
$0.6B
2 fatalities
Severe Storm
Mar 2024
$1.0B
Severe Storm
Feb 2024
$0.3B
Winter Storm
Jan 2024
$0.2B
5 fatalities
Severe Storm
Jul 2023
$0.3B
Flooding
Jul 2023
$0.4B
2 fatalities
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