Counties in Iowa by expected annual loss from natural hazards (FEMA National Risk Index), 2025
Polk County had the highest expected annual loss from natural hazards (FEMA National Risk Index) of 99 counties in 2025, at $137,588,626. Osceola County had the lowest, at $5,472,632. The median was $13,126,912 and the figure for Iowa was $1,834,453,443. Source: the Federal Emergency Management Agency.
Average loss in US dollars that FEMA expects a US state or county to suffer each year from 18 natural hazards, adding building value, agriculture value and lives lost or injuries valued in dollars, from the National Risk Index. FEMA modelled it from historical hazard frequency, exposure and loss ratios.
A modelled estimate, not recorded losses. The December 2025 edition values buildings and agriculture in December 2024 dollars. The period is the year of the National Risk Index edition (the December 2025 edition is 2025), not a year of events. FEMA rebuilds the index with new data and methods in each edition, so values from different editions are not a time series. The index is meant for nationwide comparison and planning, not as a local risk assessment.
Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.
How to cite
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL_VALT). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Citation styles
The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.
APA 7
Federal Emergency Management Agency. (2025). National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL_VALT) (Counties in Iowa by expected annual loss from natural hazards (FEMA National Risk Index), 2025) [Data set]. Retrieved October 12, 2026, from https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355
MLA 9
National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL_VALT), Counties in Iowa by expected annual loss from natural hazards (FEMA National Risk Index), 2025. Federal Emergency Management Agency, 16 Dec. 2025, https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Invokely, https://invokely.ai/rankings/expected-annual-loss-natural-hazards/iowa-counties. Accessed 12 Oct. 2026.
Chicago (author-date)
Federal Emergency Management Agency. 2025. National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL_VALT). Counties in Iowa by expected annual loss from natural hazards (FEMA National Risk Index), 2025. Dataset. Accessed October 12, 2026. https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Also distributed by Invokely, https://invokely.ai/rankings/expected-annual-loss-natural-hazards/iowa-counties.
Harvard
Federal Emergency Management Agency (2025) National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL_VALT), Counties in Iowa by expected annual loss from natural hazards (FEMA National Risk Index), 2025 [Dataset]. Available at: https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355, via Invokely: https://invokely.ai/rankings/expected-annual-loss-natural-hazards/iowa-counties (Accessed: 12 October 2026).
BibTeX
@misc{federal_counties_in_iowa_by_2025,
author = {{Federal Emergency Management Agency}},
title = {{National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL\_VALT): Counties in Iowa by expected annual loss from natural hazards (FEMA National Risk Index), 2025}},
year = {2025},
howpublished = {Data set},
url = {https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/expected-annual-loss-natural-hazards/iowa-counties. Publisher attribution: Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL\_VALT). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).},
}
RIS
TY - DATA
AU - Federal Emergency Management Agency
TI - National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL_VALT): Counties in Iowa by expected annual loss from natural hazards (FEMA National Risk Index), 2025
PY - 2025
DA - 2025/12/16
PB - Federal Emergency Management Agency
DB - Invokely
UR - https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355
L2 - https://invokely.ai/rankings/expected-annual-loss-natural-hazards/iowa-counties
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/expected-annual-loss-natural-hazards/iowa-counties.
N1 - Publisher attribution: Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL_VALT). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
ER -
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Rank Counties in Iowa by expected annual loss from natural hazards (FEMA National Risk Index) using official data, and cite the source.
rank_places {"indicator":"nri_expected_annual_loss","level":"province","within":"Iowa","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=nri_expected_annual_loss&level=province&within=Iowa&limit=10
Which county has the highest expected annual loss from natural hazards (FEMA National Risk Index)?
Polk County, with $137,588,626 in 2025, according to the Federal Emergency Management Agency.
Which county has the lowest expected annual loss from natural hazards (FEMA National Risk Index)?
Osceola County, with $5,472,632 in 2025.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: Federal Emergency Management Agency, National Risk Index Counties and States, Expected Annual Loss Total Composite (EAL_VALT). Retrieved 2026-10-12.
Expected annual loss from natural hazards (FEMA National Risk Index): other rankings