User blog comment:IamJakuhoRaikoben/Chapter 357: The Nine Demon Gates, Review./@comment-4489126-20131025131800/@comment-7418318-20131025192328

You do know that most explosions destroy with the shockwave rather than the heat, right?

And that's something Natsu has no protection against, thus he would definately NOT be immune.

Shrapnel and flying debris might also be a matter of concern.