Illinois

Comprehensive climate risk and disaster history profile

Billion-Dollar Events

$323.1B

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

Cold Wave

73.87 Avg Risk Score

Earthquake

73.13 Avg Risk Score

Strong Wind

69.0 Avg Risk Score

Drought

68.24 Avg Risk Score

Hail

61.15 Avg Risk Score

Tornado

59.56 Avg Risk Score

Winter Weather

55.11 Avg Risk Score

Historical billion-dollar events by category (1980-2024)

severe-storm 73 events

$167.6B

winter-storm 8 events

$33.9B

drought 8 events

$68.5B

flooding 5 events

$21.0B

freeze 1 events

$2.0B

tropical-cyclone 1 events

$30.0B

How disaster frequency and costs have changed over time

Counties with the highest overall risk scores based on FEMA NRI

Rank	County	Risk Score	Risk Rating	SVI Percentile
1	Cook	99.62	Very High	79.6%
2	DuPage	94.94	Relatively Moderate	22.8%
3	Lake	93.73	Relatively Moderate	47.5%
4	Will	93.48	Relatively Moderate	24.4%
5	St. Clair	93.25	Relatively Moderate	53.2%
6	Madison	92.49	Relatively Moderate	25.6%
7	Winnebago	90.45	Relatively Moderate	77.3%
8	Kane	90.04	Relatively Moderate	50.8%
9	Sangamon	88.55	Relatively Moderate	40.4%
10	McHenry	85.71	Relatively Moderate	9.2%