Maybe the fire represents renewal or rebirth. It could wipe out the old and pave the way for something new to emerge. Also, it might signify passion or intense emotions that drive the plot forward.
The fire in the novel might symbolize a form of purification or cleansing. It could eliminate impurities or negative elements, allowing for a fresh start. Additionally, it could stand for power and uncontrollable forces that the characters have to contend with.