I'm on the Southwest Chief just leaving Winslow. According to news reports there's a massive wildfire in AZ that is sending a huge amount of smoke to the N-NE. I swear the area around Grants NM looked like the surface of Titan. The entire sky had a yellowish brown tinge to it. I have seen a lot of dust storms, especially this year, but this really took the cake for incredibly crappy air quality. It cleared up by the time we got to Gallup.