User blog comment:FairyRaven/Fairy Tail Chapter 351: Eternal Fire, Review and Commentary/@comment-33019320-20130912102302/@comment-7418318-20130912103658

I think it was only the flames that were produced by the actual flames that disappeared and that the actual source of the flames, whatever it may be, is either still frozen, or needs some time to get the flames stoked to the same degree as before it's freezing.