An Air Quality Alert is in effect for Cochise County, Arizona, including Douglas, due to high levels of PM10 pollution. The National Weather Service (NWS) and the Arizona Department of Environmental Quality (ADEQ) issued the alert, warning of health risks from coarse particle pollution. PM10 particles, with a diameter of 10 micrometers or less, can irritate the eyes, nose, and throat, and affect the lungs and heart, potentially triggering asthma attacks and cardiovascular problems, particularly in sensitive groups like the elderly, children, and those with pre-existing heart or lung conditions.