Clone and the like work, for certain definitions of "survive"
in my opinion, a good dm would allow something like cone of cold to work (or at least help) - including sleet storm, tsunami, etc
Demiplane should help, but lava flows can last days or longer, so 1 hour might not help.
anything that allows flight and flight byproducts
Obviously anything that lets you become immune to fire damage. (Investiture of Flame or something)
Anything that allows you to change terrain, like mold earth.
But the best solution would be to get out of there