Residents in Chicago, particularly those in low-lying areas or neighborhoods with older infrastructure, are at risk of basement flooding during heavy rain events. Flooding can lead to property damage, mold growth, and potential health hazards from contaminated water. The city's flat terrain exacerbates the issue, as surface water tends to pool rather than drain away. Homeowners with basements are especially vulnerable, as water can back up through floor drains when the sewage system is overwhelmed.