The primary concern for Chicago residents is the potential spread of mosquito-borne diseases, including West Nile virus. While the current risk level for human infection in Cook County is labeled as low, this could change as the season progresses. Urban habitats, such as polluted storm drains, provide ideal breeding grounds for mosquitoes, making them more resilient. Additionally, the expanding range of invasive species due to climate change poses a growing public health challenge. Despite these risks, local mosquito control efforts and public health programs are mitigating the immediate threat, and no West Nile virus has been detected in recent mosquito testing.