A brown haze covered southern Nevada Thursday forcing Clark County to issue an air quality alert.

Clark County Air Quality Meteorologists issued the alert because of unhealthy levels of haze in the area. They looked at particulate matter readings in Boulder City and the Las Vegas valley. They have been deciphering whether it is smoke or dust. However, they have not had any reports of major wildfires in Arizona. So, they do not think it is smoke. At this point, they believe it is dust from Arizona where strong weather systems created big dust storms.  

Allergists and immunologists, like Dr. Joel Katz, recommend people with respiratory illnesses like asthma and emphysema stay inside until the dust is blown out of southern Nevada. Children and seniors should also stay indoors. They also recommend that normally healthy people not workout outdoors.