Board Thread:Suggestions forum/@comment-31907131-20170417102331/@comment-31907131-20170417193026

Grevious, my deluded friend. No one said it was outright fire resistance. But did Aulë create the Dwarves with special fire resistant armour? Do you know how long the Dwarves survived in Khazad-dum, even with a Balrog in the place? Do you know the Dwarves eventually drove the drakes from the Ered Mithrin?

The book says fire. Heat is not equivalent to fire. This isn't about all your theories of how many Dwarves were killed by fire. It's about how Dwarves are resistant to fire. And it certainly isn't just because of their armour.