Iowa

Comprehensive climate risk and disaster history profile

Billion-Dollar Events

$181.4B

Total Economic Impact

Counties

48.31

Avg Risk Score

Top Natural Hazards

Based on FEMA National Risk Index data across all 99 counties

Drought

84.12 Avg Risk Score

Hail

78.0 Avg Risk Score

Strong Wind

75.64 Avg Risk Score

Cold Wave

75.55 Avg Risk Score

Winter Weather

66.93 Avg Risk Score

Tornado

63.08 Avg Risk Score

Riverine Flooding

54.03 Avg Risk Score

Ice Storm

48.49 Avg Risk Score

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

severe-storm 47 events

$100.4B

drought 8 events

$64.5B

flooding 3 events

$13.8B

winter-storm 1 events

$0.7B

freeze 1 events

$2.0B

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	Johnson	93.19	Relatively Moderate	38.6%
2	Linn	91.73	Relatively Moderate	19.4%
3	Polk	91.54	Relatively Moderate	44.8%
4	Pottawattamie	83.58	Relatively Moderate	49.4%
5	Woodbury	83.46	Relatively Moderate	72.0%
6	Scott	82.06	Relatively Low	32.5%
7	Black Hawk	81.71	Relatively Low	56.7%
8	Dubuque	77.86	Relatively Low	22.8%
9	Story	76.01	Relatively Low	23.6%
10	Webster	75.18	Relatively Low	34.4%