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A Legionnaires' disease outbreak in New York City highlights the risks of poorly maintained air conditioning systems in a warming climate.

The outbreak has infected at least 67 people, hospitalized 24, and resulted in three deaths since July 25.

Oregon has seen an increase in Legionnaires' cases, with 131 reported in the last 18 months.

An outbreak of Legionnaires' disease in New York City blamed on poor maintenance of air conditioning is bringing new attention to consequences of a warming climate.

Scorching temperatures mean more people are using air conditioning, and legionella bacteria are thriving in the warm water of poorly maintained cooling towers.

Legionnaires' disease causes a serious form of pneumonia. It’s not spread person to person, but because the

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