Adults who have been in the affected area since late July with flu-like symptoms, fever, cough or difficulty breathing should seek immediate medical attention, health officials say.

NYC Health said the Legionnaires' disease outbreak in Central Harlem is now up to 73 cases, including 3 deaths, an increase of 15 cases and one fatality since Monday. Anyone in Central Harlem experiencing flu-like symptoms should seek medical care, NYC Health said, although the risk to most people is low.

New York City Department of Health inspectors are fanning out across Central Harlem to inspect cooling towers amid a deadly outbreak of Legionnaires' disease. So far there have been 73 cases identified since July 25.