A Legionnaires’ disease outbreak in Harlem has claimed a fourth life, with nearly 100 confirmed cases and more than a dozen people still hospitalized. For the first time, city officials have identified 12 cooling towers that tested positive for Legionella bacteria — including four city-owned buildings such as Harlem Hospital.

New York City's health department says all 12 cooling towers that were contaminated with the bacteria that causes Legionnaires' disease have been fully drained, cleaned and disinfected.