Arizona skywatchers were treated to a rare celestial show Tuesday as the northern lights shimmered across parts of the state.

According to the Arizona Department of Environmental Quality (ADEQ), particulate matter (PM) is a mix of tiny solids and liquid droplets in the air, made up of substances like acids, organic chemicals ...

PHOENIX (AZFamily) — While we did go through some cooler stretches this July, we’ve had plenty of hot days too. Often, the hot days go together with air quality alerts, but that’s not really the case ...