There is a Legionnaires’ disease outbreak in California’s wine country, Napa Valley, which seems to be coming from a local hotel’s cooling tower. 

According to authorities, high levels of Legionella bacteria were found in a water sample taken from a cooling tower at Embassy Suites Napa Valley, although none of those who were sickened had visited or stayed at the hotel, according to a Napa County statement.

“The cooling tower has since been taken offline, which mitigates any ongoing risk to public health,” the statement said.

County and state public health investigators have been working with the hotel staff to narrow down the source and look into other cooling towers.

Legionnaires’ disease is a type of pneumonia caused by bacteria that grow in warm water.

People can get Legionnaires’ disease when they breathe in water vapor containing the bacteria.

The disease isn’t contagious, and can be treated with antibiotics, but can be dangerous for some people, such as those with pre-existing conditions. Symptoms include muscle aches, fever and chills.

A total of 12 Napa County residents have been hospitalized with the disease since July 11. Three remain hospitalized and one person died, the county said. The person who passed away was over 50 and had “risk factors for severe disease.”

Here’s more via NBC News.