A deadly Legionnaires’ disease outbreak in Central Harlem has claimed a third life, with 67 people diagnosed since July 25, 2025, according to the New York City Health Department. The cluster, linked to contaminated cooling towers in five ZIP codes—10027, 10030, 10035, 10037, and 10039—continues to grow, prompting urgent health warnings. The disease, a severe form of pneumonia caused by Legionella bacteria, is spread through inhaling water vapor from sources like cooling towers, hot tubs, or plumbing systems, but it is not contagious and can be treated with antibiotics if caught early.
Health officials have identified 11 cooling towers with initial positive tests for Legionella pneumophila, and remediation efforts are underway. Acting Health Commissioner Dr. Michelle Morse urged residents and workers in the affected areas experiencing flu-like symptoms—such as cough, fever, chills, or difficulty breathing—to seek immediate medical attention. Those over 50, smokers, or with chronic lung conditions or weakened immune systems face higher risks. The Health Department emphasized that drinking water, bathing, and using air conditioners remain safe, as the outbreak is not tied to building plumbing systems.
The rising case count, up from 22 last week, recalls a 2022 Manhattan nursing home outbreak that killed five. Health officials are intensifying efforts to contain the spread, with ongoing testing and remediation of cooling towers. The outbreak underscores the need for regular maintenance of water systems to prevent Legionella growth, as the city grapples with this public health crisis.
