How come Azula's Fire is hotter than the Firelord's?

Question

Azula's is blue which is hotter but the Firelord's is Orange,yellow, and red.

Answer 1

First, she is a child prodigy, which means she has mastered the art of firebending completely, and makes her fire hotter than normal. In real life, very hot fire is in fact blue. Plus, if you pull apart Azula's name, you get Azul, which translates to "blue". Plus, learning from the last episode, she has an internal balance that is completely out of whack, which may affect her firebending.