Smoke Drives Unhealthy Air in Las Vegas as Health District Flags Legionella at Two Hotels
Las Vegas, NV – March 10, 2026 – Wildfire smoke pushes air quality into unhealthy levels as SNHD alerts recent hotel guests to possible Legionella exposure.
Wildfire smoke drifting into the Las Vegas Valley has pushed air quality into the unhealthy range, while local health officials continue investigating Legionella bacteria detected at two major hotel properties.
Air Quality Slips Into Unhealthy Range
Local reporting shows the Air Quality Index in parts of the valley climbing into the 151–200 range as smoke from California wildfires settles over Southern Nevada. At that level, air pollution can affect anyone, with greater impact on people who have asthma, chronic lung disease, heart conditions, older adults, pregnant people, and young children.
Officials recommend limiting prolonged outdoor exertion during unhealthy air days and checking updated AQI readings through official sources such as AirNow. School sports, outdoor exercise routines, and job sites with extended outdoor work may be affected while smoke lingers.
Legionella Detected at Two Las Vegas Hotels
The Southern Nevada Health District is advising recent guests of The Grandview and South Point Hotel to monitor for symptoms of Legionnaires’ disease after water samples at both properties tested positive for Legionella bacteria.
Legionnaires’ disease is a type of pneumonia that can begin with fever, cough, shortness of breath, muscle aches, and headaches. Symptoms typically develop within two to ten days after exposure. Health officials have urged anyone who stayed at the affected properties and develops symptoms within about two weeks of their stay to seek medical evaluation and inform their clinician about the possible exposure.
The Health District said the investigation includes water system assessments and remediation steps at the properties.
What Residents Should Know
Air quality conditions can change quickly depending on wind and wildfire activity. Residents can monitor daily conditions through regional air quality updates and adjust outdoor plans when readings rise into unhealthy levels.
For those who recently stayed at the identified hotels, awareness of pneumonia-like symptoms is important during the two-week window following a visit. The Health District continues to provide updates related to the Legionella findings.
If you have urgent symptoms, seek medical care. For general questions, talk with a licensed clinician.
