Three people have been killed this week by an outbreak of Legionnaires' disease in central Harlem, Manhattan, according to the New York City Health Department. At least 64 other people have been diagnosed since July 25. The rapidly expanding cluster has prompted urgent public health interventions with residents and workers in five Harlem ZIP codes.

Health officials in New York City say an outbreak of Legionnaires’ disease in Central Harlem has grown to 90 cases, including three deaths.

Four people have died as a result of a Legionnaires’ disease outbreak in Harlem that has sickened nearly 100 people, and officials revealed the cooling towers that tested positive for the bacteria that causes the illness — some of which are at properties owned by New York City,