Oswego, IL (ZIP 60543) has experienced 141 recorded natural disaster events based on federal and state agency records. These include 108 hailstorms, 17 tornadoes, and 12 severe wind events. Total documented property damage amounts to $262.8M. These events have resulted in 30 recorded deaths and 369 injuries.
The dominant hazard type for Oswego is hailstorms, with 108 recorded events making up 77% of the area's disaster history. Of these, 2 (2%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for hail-related events here is 4/5 (severe). Hail-related events have caused a combined $5K in documented property damage. The most recent recorded hailstorm occurred on Aug 16, 2025.
There have been 17 recorded tornadoes in this area, representing 12% of all disaster events. Of these, 7 (41%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for tornado-related events here is 5/5 (extreme). Tornado-related events have caused a combined $261.1M in documented property damage. 30 fatalities have been attributed to tornadoes in this area. The most recent recorded tornado occurred on Jul 15, 2024.
There have been 12 recorded severe wind events in this area, representing 9% of all disaster events. Wind-related events have caused a combined $225K in documented property damage. The most recent recorded severe wind event occurred on Aug 10, 2020.
Oswego has experienced 4 floods on record. Of these, 4 (100%) 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 $1.4M in documented property damage. The most recent recorded flood occurred on Aug 17, 2025.
The most significant disaster event on record for Oswego was EF5 Tornado on Aug 28, 1990, which caused $250M in property damage and was linked to 29 fatalities. Another major event was EF3 Tornado (Apr 27, 1984), causing $2.5M in damages. EF3 Tornado on Apr 27, 1984 also caused significant damage ($2.5M).
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Based on federal and state records, ZIP code 60543 has experienced 141 natural disaster events. The hazard types affecting this area include hailstorms (108 events), tornadoes (17 events), severe wind events (12 events), and floods (4 events). The primary hazard is hailstorms, which account for 77% of all recorded events.
Hailstorms are the most frequently recorded hazard in Oswego, IL, with 108 events documented. These events have caused a combined $5K in property damage.
Yes, Oswego (ZIP 60543) has 4 recorded flood events. These floods have caused $1.4M in total property damage. The most recent flood on record occurred on Aug 17, 2025.
Oswego has 17 recorded tornado events in the historical record. The strongest tornado recorded reached severity level 5/5 on the normalized scale. Total property damage from tornadoes in this area is $261.1M. The most recent tornado was recorded on Jul 15, 2024.
The most damaging natural disaster on record for ZIP code 60543 was EF5 Tornado, which occurred on Aug 28, 1990. This event caused $250M in documented property damage. It resulted in 29 reported fatalities. It was rated at severity level 5/5.
Natural disasters have caused a documented total of $262.8M in property damage in the Oswego, IL area (ZIP 60543). 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 →