New York City health officials say a second person has died in connection with a Legionnaires’ disease outbreak in the city. The death was announced Saturday, adding urgency to an outbreak centered on Manhattan’s Upper East Side.

Legionnaires’ disease is a severe form of pneumonia caused by bacteria linked to water environments. The illness can become serious, which is why outbreaks often prompt a close public health response when multiple cases are identified in one area.

The latest fatality underscores the seriousness of the New York outbreak as health authorities continue to track the situation. While details in the brief announcement were limited, the city’s health department has made clear that the outbreak remains an active concern.

With the cluster tied to the Upper East Side, attention is now focused on limiting further spread and understanding the scope of the outbreak. The second reported death marks a troubling development in a health issue that city officials are continuing to monitor.