Natural Disaster Risk in Lewis County

Natural Hazard Profile: Lewis County, Missouri

Lewis County, in the United States in Missouri, is characterized by its humid continental climate — hot summers, cold winters, and collision of multiple air masses. The county faces year-round severe weather including tornadoes, ice storms, and floods, and its FEMA risk assessment establishes the hazard baseline shared by all the towns and cities it contains.

Lewis County's overall natural disaster risk is rated 5.2/10 (Moderate) by FEMA's National Risk Index. The threat of extreme heat dominates the local risk profile, with the area experiencing heat waves that drive heat-related illness and place significant demand on energy infrastructure. Secondary hazards include landslide and drought.

Within Missouri, Lewis County's risk is, slightly below the 5.9/10 state average. Nationally, it ranks above the U.S. national average of 4.5/10. FEMA's analysis of Lewis County identifies heat as the foremost hazard, followed by landslide and drought. These rankings reflect the relative frequency and severity of each hazard type in the local environment.

With a moderate risk rating, Lewis County residents are well-served by maintaining standard preparedness practices — an emergency supply kit, awareness of local hazard seasonality, and insurance that covers the top local risks. Periodic review of coverage for heat is recommended.