The five zip codes where the cluster of cases are located are 10027, 10030, 10035, 10037 and 10039. Additionally, 12 cooling towers have tested positive for live bacteria in 10 buildings. Eleven of these towers have been sanitized and treated, and the last will be completed on Aug. 15.

Announcement of the latest death comes just hours after city officials identified 12 cooling towers in 10 Harlem buildings that tested positive for Legionnaires' disease.

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,

The city Health Department is proposing stricter rules to combat Legionnaires’ disease amid one of the worst Legionnaires’ outbreaks in years that impacted Harlem.

Here’s what to know about water-cooling towers amid a cluster of Legionnaires’ disease cases in Central Harlem.