The overflow of stormwater and sewage into residential basements creates severe health risks due to exposure to biohazardous materials. Older neighborhoods in Cincinnati, including Walnut Hills, Avondale, and Evanston, are particularly vulnerable. Residents may face costly cleanup and repairs, especially if their insurance policies lack sewer backup endorsements. Additionally, the environmental impact of untreated sewage entering local waterways further exacerbates the issue.