Government agency data shows 39 natural disaster events for ZIP 62423 in Dennison, IL. These include 19 hailstorms, 10 floods, and 8 tornadoes. Total documented property damage amounts to $8.8M. These events have resulted in 1 recorded death and 1 injury.
The dominant hazard type for Dennison is hailstorms, with 19 recorded events making up 49% of the area's disaster history. The most recent recorded hailstorm occurred on Jun 25, 2024.
Dennison has experienced 10 floods on record. Of these, 6 (60%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for flood-related events here is 5/5 (extreme). Flood-related events have caused a combined $8.2M in documented property damage. The most recent recorded flood occurred on Apr 4, 2025.
Dennison has experienced 8 tornadoes on record. Tornado-related events have caused a combined $450K in documented property damage. The most recent recorded tornado occurred on Apr 2, 2025.
Dennison has experienced 2 blizzards on record. Of these, 2 (100%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for winter storm events here is 4/5 (severe). Winter storm events have caused a combined $100K in documented property damage. 1 fatality has been attributed to blizzards in this area. The most recent recorded blizzard occurred on Jan 8, 2022.
The most significant disaster event on record for Dennison was Flood on Jul 7, 2003, which caused $7M in property damage. Another major event was Flood (Jan 22, 1999), causing $1M in damages.
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Based on federal and state records, ZIP code 62423 has experienced 39 natural disaster events. The hazard types affecting this area include hailstorms (19 events), floods (10 events), tornadoes (8 events), and blizzards (2 events). The primary hazard is hailstorms, which account for 49% of all recorded events.
Hailstorms are the most frequently recorded hazard in Dennison, IL, with 19 events documented.
Yes, Dennison (ZIP 62423) has 10 recorded flood events. These floods have caused $8.2M in total property damage. The most recent flood on record occurred on Apr 4, 2025.
Dennison has 8 recorded tornado events in the historical record. The strongest tornado recorded reached severity level 3/5 on the normalized scale. Total property damage from tornadoes in this area is $450K. The most recent tornado was recorded on Apr 2, 2025.
The most damaging natural disaster on record for ZIP code 62423 was Flood, which occurred on Jul 7, 2003. This event caused $7M in documented property damage. It was rated at severity level 5/5.
Natural disasters have caused a documented total of $8.8M in property damage in the Dennison, IL area (ZIP 62423). This figure is based on historical records from FEMA, NOAA Storm Events Database, and USGS, and covers events from the 1950s through the present. Actual damages may be higher, as not all events have complete damage assessments.
Data sourced from FEMA (disaster declarations, NFIP flood claims), NOAA Storm Events Database, USGS Earthquake Hazards Program, and NIFC wildfire records. Historical coverage varies by source, with most records beginning in the 1950s–1970s. Full methodology →