Why is the sky so hazy in Austin?

AUSTIN (KXAN) -- A combination of "humidity haze" and light amounts of smoke from agricultural burning in Mexico are leading to unhealthy air quality for some in our area Monday evening, according to the Texas Commission on Environmental Quality (TCEQ).Hazy skies obscured some of the searing sunshine across Central Texas on Monday. Copious amounts of atmospheric moisture leading to a sauna-like feeling outside also create more particulate matter in the atmosphere, lowering visibility and decreas