Two separate guests walked away from luxe stays at Wynn Las Vegas only to be diagnosed with Legionnaires’ disease, prompting a full-blown investigation from the Southern Nevada Health District, the agency announced Tuesday. One guest stayed at the resort in September 2025 and the other in February 2026; both have since recovered. Environmental testing at the property found Legionella bacteria in multiple water samples, and the resort says it has begun water-system remediation while notifying visitors who may have been exposed.
According to a press release from the Southern Nevada Health District, the illnesses are considered travel-associated and triggered environmental sampling after officials were notified of the cases. The agency reports that multiple environmental samples initially tested positive for Legionella and notes that the property is cooperating with the probe and conducting ongoing follow-up testing.
Local coverage has backed up those findings and outlined Wynn’s response. As reported by FOX5 Las Vegas, the resort has launched what health officials characterize as immediate, comprehensive remediation of its water systems, and more recent follow-up tests in the affected areas have not detected the bacteria. The property has also begun direct outreach to guests to alert anyone who might have been impacted.
The Health District is urging anyone who stayed at Wynn Las Vegas on or after Sept. 1, 2025 to complete a confidential illness survey and to seek medical care if they develop symptoms. The agency notes that symptoms typically appear within two to 10 days after exposure and can include cough, shortness of breath, fever, muscle aches and headache. The Centers for Disease Control and Prevention adds that older adults, current or former smokers and people with chronic lung disease or weakened immune systems face a higher risk of severe illness.
Pattern Of Hotel-Linked Probes
Health officials say the Wynn inquiry is the latest in a run of Legionella investigations tied to hotel properties across southern Nevada. Earlier cases included a cluster at Harrah’s Laughlin in January and a May 2025 probe that linked five travel-associated cases to South Point and The Grandview, each prompting water-system remediation and guest outreach. Coverage of those episodes and the follow-up work has appeared in reports on the Legionnaires scare at Harrah’s Laughlin and in the Las Vegas Review-Journal.
What Wynn Is Doing
Wynn officials say they are working hand in hand with the Health District, cleaning and testing the resort’s water systems and continuing to notify guests who may have been affected. FOX5 Las Vegas reports that the resort describes its remediation as immediate and comprehensive and plans to continue follow-up testing to verify that Legionella is no longer present.
Health authorities stress that anyone who stayed at Wynn Las Vegas and later develops cough, fever or shortness of breath should seek medical attention and let their provider know about a potential Legionella exposure. The CDC offers detailed guidance for clinicians and travelers, while the Southern Nevada Health District is maintaining a confidential illness survey and helpline for guests and health care providers with questions.
