With 373 documented natural disaster events, ZIP code 57751 in Keystone, SD has a substantial history of natural hazard activity. These include 345 hailstorms, 10 wildfires, and 8 floods. Total documented property damage amounts to $16.1M. A total of 20 injuries have been reported across all events.
The dominant hazard type for Keystone is hailstorms, with 345 recorded events making up 92% of the area's disaster history. Of these, 5 (1%) 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 5/5 (extreme). Hail-related events have caused a combined $11.1M in documented property damage. The most recent recorded hailstorm occurred on Jul 1, 2025.
Keystone has experienced 10 wildfires on record. Of these, 2 (20%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for wildfire-related events here is 4/5 (severe). The most recent recorded wildfire occurred on Mar 14, 2023.
Keystone has experienced 8 floods on record. Of these, 6 (75%) 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 $4.9M in documented property damage. The most recent recorded flood occurred on May 28, 2019.
Keystone has experienced 7 tornadoes on record. Tornado-related events have caused a combined $155K in documented property damage. The most recent recorded tornado occurred on May 23, 2021.
Keystone has experienced 2 severe wind events on record. The most recent recorded severe wind event occurred on Jun 30, 2001.
Keystone has experienced 1 earthquake on record. The most recent recorded earthquake occurred on Dec 12, 2013.
The most significant disaster event on record for Keystone was 1.8" Hail on Aug 11, 2013, which caused $6M in property damage. Another major event was Flash Flood (Aug 17, 2007), causing $3M in damages. 2.5" Hail on Jul 29, 2010 also caused significant damage ($1M).
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Based on federal and state records, ZIP code 57751 has experienced 373 natural disaster events. The hazard types affecting this area include hailstorms (345 events), wildfires (10 events), floods (8 events), tornadoes (7 events), severe wind events (2 events), and earthquake (1 event). The primary hazard is hailstorms, which account for 92% of all recorded events.
Hailstorms are the most frequently recorded hazard in Keystone, SD, with 345 events documented. These events have caused a combined $11.1M in property damage.
Yes, Keystone (ZIP 57751) has 8 recorded flood events. These floods have caused $4.9M in total property damage. The most recent flood on record occurred on May 28, 2019.
Keystone has 7 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 $155K. The most recent tornado was recorded on May 23, 2021.
The most damaging natural disaster on record for ZIP code 57751 was 1.8" Hail, which occurred on Aug 11, 2013. This event caused $6M in documented property damage. It was rated at severity level 2/5.
Natural disasters have caused a documented total of $16.1M in property damage in the Keystone, SD area (ZIP 57751). 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 →