Tornado Risk in Illinois
Overall State Risk Score: 7/10
Illinois faces very high tornado risk. 14 of 102 counties (14%) rated high or very high by FEMA National Risk Index.
Seasonal pattern: April-June
Highest-Risk Cities in Illinois
Tornado counts are distinct tornadoes whose path came within 50 km of the city centre, January 2015 through September 30, 2026, from NWS and SPC tornado records. 2026 figures are provisional until SPC publishes its final 2026 tornado file, and September 2026 is preliminary while NWS damage surveys are completed.
Other Hazards in Illinois
How this data is built
Illinois tornado risk combines Historical Event Intelligence with authoritative hazard modeling from the Geospatial Intelligence Layers catalog. Live event monitoring is available through the Event Intelligence API and the DisasterAWARE Platform.
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The data behind this page
Every score and event here comes from DisasterAWARE's hazard database — available as downloadable historical datasets and a real-time API.
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