Although not historically accurate, clothing made of Dupont Nomex Aramid is probably the safest thing to wear in an environment where there are fire hazards. This fabric is available in a variety of textures and weights and will char, but will not burn or melt all over you. Nomex is the preferred fabric for clothing worn by firefighters, fighter pilots and race car drivers....even move stunt-men. It's not inexpensive, but it is very protective. I've worn it for 36 years, flying aircraft. Well worth the investment.
/Kevin Madore