A Legionnaires' disease outbreak in New York City's Central Harlem has resulted in 111 confirmed cases and six deaths, according to the New York City Health Department. The outbreak, first identified on July 25, 2025, has also led to seven hospitalizations as of August 22. Health officials believe the source of the infection is contaminated mist from cooling towers in the area. The number of cases and fatalities has increased steadily since mid-August, with the death toll rising from four to six over the course of a week. The disease is a form of pneumonia caused by Legionella bacteria, which can spread through inhalation of contaminated water droplets. Authorities continue to monitor the situation and investigate the outbreak's origins and spread within the Harlem neighborhood.