Johnson County Disaster Risk

Johnson County has a FEMA National Risk Index rating of Relatively Low, placing it in the 55th 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.

Johnson County is evaluated for five major natural hazard types: flooding (60th percentile), tornado (57th percentile), earthquake (50th percentile), wildfire (29th percentile), hurricane (22th percentile). The highest-risk hazard is flooding at the 60th 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.

Johnson County's composite risk percentile is 55th, compared to the Missouri state average of 51th percentile. The state's overall risk rating is Relatively Low. This means Johnson County faces higher natural disaster risk than the typical county in Missouri.

Yes, Johnson County's flooding risk is at the 60th percentile nationally. This is above the national median.

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.

Johnson County's composite risk score of 55th percentile is above the Missouri state average of 51th percentile. This elevated risk is driven by flooding exposure (60th percentile), along with tornado risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.