Brazoria County
Texas — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 94th
Brazoria County faces medium composite natural disaster risk (NRI Risk Index score 93.6, 94th national percentile), driven primarily by tornado and hurricane exposure. Expected annual loss across all 18 hazard types is $161M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Tornado | High | 1.11 / yr | $21M |
| Hurricane | High | 0.22 / yr | $44M |
| Lightning | High | 70.01 / yr | $2M |
| Riverine Flood | High | 1.86 / yr | $78M |
| Heat Wave | Medium | 14.91 / yr | $5M |
| Wildfire | Low | 0.00 / yr | $887K |
| Ice Storm | High | 0.69 / yr | $691K |
| Drought | Medium | 28.52 / yr | $1M |
| Cold Wave | Medium | 0.44 / yr | $5M |
| Coastal Flood | Medium | 3.74 / yr | $2M |
| Hail | Low | 1.59 / yr | $432K |
| Strong Wind | Medium | 1.03 / yr | $822K |
| Earthquake | Very Low | 0.00 / yr | $254K |
| Landslide | Very Low | 0.13 / yr | $988 |
| Winter Weather | Very Low | 0.89 / yr | $23K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Brazoria County?
Brazoria County has a composite FEMA National Risk Index score of 93.6 out of 100, placing it in the Medium category and the 94th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Brazoria County?
The three highest-rated hazards are Tornado (High, $21M EAL), Hurricane (High, $44M EAL), Lightning (High, $2M EAL). These account for most of the county's expected annual losses.
How does Brazoria County compare to other Texas counties?
Brazoria County ranks #17 of 254 Texas counties for overall natural disaster risk, with a medium rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Brazoria County's $161M EAL is a statistical average, not a guarantee for any specific year or address.