San Marcos, TX (ZIP 78666) has experienced 153 recorded natural disaster events based on federal and state agency records. These include 113 hailstorms, 18 tornadoes, and 10 floods. Total documented property damage amounts to $279.7M. These events have resulted in 2 recorded deaths and 78 injuries.
Hailstorms represent the most common natural hazard in this area, accounting for 74% of all recorded events (113 total). Of these, 4 (4%) 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 $100.7M in documented property damage. The most recent recorded hailstorm occurred on May 22, 2025.
There have been 18 recorded tornadoes in this area, representing 12% of all disaster events. Tornado-related events have caused a combined $51.9M in documented property damage. The most recent recorded tornado occurred on Feb 19, 2017.
San Marcos has experienced 10 floods on record. Of these, 9 (90%) 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 $111.2M in documented property damage. 2 fatalities have been attributed to floods in this area. The most recent recorded flood occurred on Dec 7, 2018.
San Marcos has experienced 10 severe wind events on record. Wind-related events have caused a combined $13.4M in documented property damage. The most recent recorded severe wind event occurred on Oct 24, 2025.
San Marcos 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 5/5 (extreme). Winter storm events have caused a combined $2.5M in documented property damage. The most recent recorded blizzard occurred on Feb 1, 2023.
The most significant disaster event on record for San Marcos was Flash Flood on May 24, 2015, which caused $100M in property damage. Another major event was 4.2" Hail (Apr 20, 2006), causing $100M in damages. EF2 Tornado on Aug 10, 1980 also caused significant damage ($25M).
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Based on federal and state records, ZIP code 78666 has experienced 153 natural disaster events. The hazard types affecting this area include hailstorms (113 events), tornadoes (18 events), floods (10 events), severe wind events (10 events), and blizzards (2 events). The primary hazard is hailstorms, which account for 74% of all recorded events.
Hailstorms are the most frequently recorded hazard in San Marcos, TX, with 113 events documented. These events have caused a combined $100.7M in property damage.
Yes, San Marcos (ZIP 78666) has 10 recorded flood events. These floods have caused $111.2M in total property damage. The most recent flood on record occurred on Dec 7, 2018.
San Marcos has 18 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 $51.9M. The most recent tornado was recorded on Feb 19, 2017.
The most damaging natural disaster on record for ZIP code 78666 was Flash Flood, which occurred on May 24, 2015. This event caused $100M in documented property damage. It was rated at severity level 5/5.
Natural disasters have caused a documented total of $279.7M in property damage in the San Marcos, TX area (ZIP 78666). 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 →