What was more surprising: how the breakdown between states with more dangerous drivers and safer drivers fell almost completely along the lines of the 2008 McCain-Obama election, with the Republicans again coming up on the short end.
The hottest flame color is white, with the absolute temperature dependent on the fuel/mixture burned. Flame color depends on several factors, the most important typically being blackbody radiation and spectral band emission, with both spectral line emission and spectral line absorption playing smaller roles.
A yellow burner flame means the burner is not getting enough air. Gas stoves are popular with homeowners because they provide efficient heat transfer with precise heat control. They heat cookware with flame from a burner. A properly adjusted gas stove burner burns with a blue flame. But if the burner is out of adjustment, the gas flame will be yellow.