Bryan County Disaster Risk

Bryan County has a FEMA National Risk Index rating of Relatively Low, placing it in the 75th percentile nationally out of 3,144 counties. This composite score reflects the county's overall exposure to natural hazards including floods, wildfires, tornadoes, earthquakes, and hurricanes, weighted by expected annual loss and social vulnerability.

Bryan County is evaluated for five major natural hazard types: tornado (95th percentile), wildfire (88th percentile), earthquake (64th percentile), flooding (54th percentile), hurricane (46th percentile). The highest-risk hazard is tornado at the 95th percentile nationally. These scores are derived from FEMA's National Risk Index, which analyzes expected annual loss, social vulnerability, and community resilience for each hazard type.

Bryan County's composite risk percentile is 75th, compared to the Oklahoma state average of 56th percentile. The state's overall risk rating is Relatively Low. This means Bryan County faces higher natural disaster risk than the typical county in Oklahoma.

Yes, Bryan County's tornado risk is at the 95th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Bryan County is at the 54th percentile.

FEMA's National Risk Index (NRI) calculates risk scores for 18 natural hazard types across all U.S. counties and census tracts. The composite score combines Expected Annual Loss (estimated dollar losses from each hazard), Social Vulnerability (demographic factors affecting disaster impact), and Community Resilience (ability to recover). Percentile scores rank each county against all 3,144 U.S. counties, and risk ratings range from Very Low to Very High.

Bryan County's composite risk score of 75th percentile is above the Oklahoma state average of 56th percentile. This elevated risk is driven by tornado exposure (95th percentile), along with wildfire and earthquake and flooding risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.