A Legionnaires' disease outbreak in Central Harlem, New York City, has resulted in 67 confirmed cases and three deaths since July 25, 2025. The affected ZIP codes include 10027, 10030, 10035, 10037, and 10039. City health officials have linked the outbreak to contaminated cooling towers, which are water-containing structures used to cool buildings; 11 of these towers initially tested positive for the bacteria that causes Legionnaires' disease. Residents and workers in the impacted areas who experience flu-like symptoms are urged to seek immediate medical attention, as early diagnosis can lead to effective treatment. Despite the growing cluster, the New York City Department of Health maintains that the risk to the general population remains low.