Six people have died, and more than 100 others have been sickened in a Legionnaires’ disease outbreak centered in New York City. The situation has prompted an aggressive sweep of building cooling towers and an urgent warning to residents and workers with flu-like symptoms.

About one in 10 people who get sick from Legionnaires' disease die from the disease due to complications from illness, CDC said.

There are now 108 confirmed cases of the potentially deadly form of pneumonia in Harlem since late July, NYC officials said.