San Marcos, TX
Local storm history & FEMA National Risk Index data
San Marcos is rated Relatively Moderate for overall natural hazard risk — near the middle compared to other US counties — based on FEMA's National Risk Index for Hays County, TX. The county's highest-rated hazards are hail, tornado, and lightning.
Storm events near San Marcos
NOAA-recorded tornado, hail, and flood events within 25 miles of San Marcos's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to San Marcos itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Hays County's FEMA National Risk Index scores, covering San Marcos along with the rest of the county, not a San Marcos-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 87.9 | Relatively Low |
| Inland Flooding | 93.2 | Relatively Moderate |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 25.8 | Very Low |
| Heat Wave | 92.1 | Relatively Moderate |
| Tornado | 96.1 | Relatively High |
| Avalanche | — | Not Applicable |
| Cold Wave | 79.8 | Relatively Moderate |
| Drought | 77.6 | Relatively Moderate |
| Hail | 96.8 | Relatively High |
| Hurricane | 63.9 | Relatively Low |
| Ice Storm | 64.4 | Relatively Moderate |
| Landslide | 43.5 | Very Low |
| Lightning | 94.8 | Relatively High |
| Strong Wind | 86.1 | Relatively High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 93.8 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Hays County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Hays County:
More on Hays County:
Frequently asked questions
What natural hazards is San Marcos, TX at risk of?
San Marcos is rated Relatively Moderate for overall natural hazard risk by FEMA's National Risk Index — near the middle compared to other US counties. The highest-rated hazards for Hays County, where San Marcos is located, are hail, tornado, and lightning.
What is San Marcos's biggest natural hazard risk?
Hail is the highest-rated hazard for Hays County, where San Marcos is located, scoring 96.8 out of 100 on FEMA's National Risk Index (rated "Relatively High").
Is San Marcos a high-risk area for natural disasters?
Somewhat — San Marcos carries near the middle compared to other US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Moderate" for Hays County.
Has San Marcos had tornadoes, hail, or flooding?
NOAA has recorded 14 tornado, 165 hail, 94 inland flooding events within 25 miles of San Marcos since 2016.