Government agency data shows 47 natural disaster events for ZIP 20634 in Great Mills, MD. These include 30 hailstorms, 5 tornadoes, and 5 severe wind events. Total documented property damage amounts to $710K. These events have resulted in 2 recorded deaths and 1 injury.
Hailstorms represent the most common natural hazard in this area, accounting for 64% of all recorded events (30 total). Hail-related events have caused a combined $5K in documented property damage. The most recent recorded hailstorm occurred on May 22, 2025.
Great Mills has experienced 5 tornadoes on record. Tornado-related events have caused a combined $382.5K in documented property damage. The most recent recorded tornado occurred on Jul 14, 2004.
Great Mills has experienced 5 severe wind events on record. The most recent recorded severe wind event occurred on Jul 8, 2025.
Great Mills has experienced 3 floods on record. Of these, 2 (67%) 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 $305K in documented property damage. The most recent recorded flood occurred on Jun 9, 2021.
Great Mills has experienced 2 blizzards on record. Winter storm events have caused a combined $15K in documented property damage. The most recent recorded blizzard occurred on Feb 5, 2010.
Great Mills has experienced 1 extreme cold event on record. Cold-related events have caused a combined $2.5K in documented property damage. The most recent recorded extreme cold event occurred on Mar 11, 1998.
The most significant disaster event on record for Great Mills was Coastal Flood on Feb 4, 1998, which caused $250K in property damage. Another major event was EF1 Tornado (Sep 5, 1979), causing $250K in damages.
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Based on federal and state records, ZIP code 20634 has experienced 47 natural disaster events. The hazard types affecting this area include hailstorms (30 events), tornadoes (5 events), severe wind events (5 events), floods (3 events), blizzards (2 events), extreme cold event (1 event), and extreme heat event (1 event). The primary hazard is hailstorms, which account for 64% of all recorded events.
Hailstorms are the most frequently recorded hazard in Great Mills, MD, with 30 events documented. These events have caused a combined $5K in property damage.
Yes, Great Mills (ZIP 20634) has 3 recorded flood events. These floods have caused $305K in total property damage. The most recent flood on record occurred on Jun 9, 2021.
Great Mills has 5 recorded tornado events in the historical record. Total property damage from tornadoes in this area is $382.5K. The most recent tornado was recorded on Jul 14, 2004.
The most damaging natural disaster on record for ZIP code 20634 was Coastal Flood, which occurred on Feb 4, 1998. This event caused $250K in documented property damage. It was rated at severity level 5/5.
Natural disasters have caused a documented total of $710K in property damage in the Great Mills, MD area (ZIP 20634). 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 →