Natural Disaster Risk in Jefferson County

Natural Hazard Profile: Jefferson County, Missouri

Jefferson County is located in the United States in Missouri, home to roughly 226,703 residents. The county experiences hot summers, cold winters, and collision of multiple air masses, with year-round severe weather including tornadoes, ice storms, and floods shaping the natural hazards faced by its communities. FEMA assesses risk at this county level, providing the baseline for every city and ZIP code within its boundaries.

According to FEMA's National Risk Index, Jefferson County carries an overall risk score of 7.4/10, placing it in the high category. Wind damage from severe weather systems tops the local risk profile, with open terrain and frequent storm activity amplifying exposure to destructive gusts. The area also faces notable exposure to landslide and tornado.

Jefferson County's risk score, slightly above the 5.9/10 state average and well above the U.S. national average of 4.5/10. Of the 18 hazard categories tracked by FEMA for Jefferson County, the highest-scoring are wind, landslide, and tornado. These scores reflect county-level data and represent the baseline risk that all communities in the county share.

Jefferson County's high risk designation reflects meaningful exposure to natural hazards. Residents should verify that their insurance covers the area's primary risks, prepare a family emergency plan, and stay informed about seasonal hazard peaks through local weather and emergency management services.