The Pima County Department of Environmental Quality has issued an air quality advisory for Tucson because of high levels of airborne particulates.
The hazy skies are linked to wildfires burning in the area, particularly the Frye Fire near Safford.
According to the National Weather Service winds are bringing smoke from the 11,000-acre fire on the north side of Mount Graham into the Tucson area. Gusty winds later Tuesday could add airborne dust into the mix of elevated particulates, the department said.
Particulate levels will likely remain higher for a day or more until the wind direction and speeds change or it rains. The department said when the cloud cover in the area dissipates it will likely increase ground-level ozone pollution as well.
Individuals with heart disease and respiratory sensitivities may want to reduce their level of exertion to decrease the amount of particulates they breathe into their lungs. Small particles can travel into the respiratory system and cause short-term health effects such as eye, nose, throat, and lung irritation, coughing, sneezing, runny nose and shortness of breath. Those most at risk may feel better if they avoid outside exercise, stay inside as much as possible, and keep windows and doors closed to help reduce exposure to particulate matter.
Particulate matter is made up of tiny specks of soot, dust, and aerosols that are suspended in the air we breathe.
