Wildfire smoke drifts over Las Vegas, sparking air quality advisory
Wildfires in California and Arizona clouded the air in the Las Vegas Valley on Tuesday, prompting Clark County to issue an air quality advisory for Tuesday and Wednesday.
The Department of Air Quality said in a news release that elevated levels of smoke contributed to the advisory. Dust particles in smoke can contribute to ground-level ozone, which can cause coughing, wheezing and shortness of breath, the department said. A seasonal ozone advisory remained in effect.
Air quality in the Reno-Sparks area in Northern Nevada has been affected by smoke from wildfires in California and Nevada, creating some of the worst pollution levels ever recorded there, according to the Washoe County Health District.
Two Nevada National Guard helicopters were sent to California on Monday, likely to help fight the Mendocino Complex fires near Lakeport, California, that have burned more than 56,000 acres. Lakeport, in Northern California, is at least a 10-hour drive from Las Vegas. 
In addition to smoky air, the Las Vegas Valley is facing the possibility of thunderstorms over the next several days.
Scattered showers are forecast for Wednesday and Thursday, National Weather Service meteorologist Kate Guillet said, with about a 20 percent chance of rain in the afternoons and evenings.
Temperatures are expected to drop from Tuesday’s high of 109 degrees to 107 on Wednesday and Thursday. The chance for thunderstorms will start to decrease Thursday, according to forecasts, and rain is more likely to fall over the Spring Mountains than the valley by the end of the week.
Morning lows will stay in the mid-80s through the week, Guillet said.
By Friday, the valley should start to dry out with a slight chance of rain in the forecast, weather service meteorologist Ashley Wolf said, and the weekend likely will stay dry and sunny. Friday’s forecast high is 106, and Saturday will kick off the weekend with a high near 107, she said.
The normal high for this time of year is about 104.
Contact Katelyn Newberg at knewberg@reviewjournal.com or 702-383-0240. Follow @k_newberg on Twitter. Review-Journal staff writers Max Michor and Mike Shoro contributed to this report.