Valmiki Ramayana Sundara Kanda Sarga 54 Shloka 21

हुताशनः consumer of oblations, Firegod, श्वसनेन by the wind, संयोगात् by association, अतिवेगः at great speed, महाबलः mighty, प्रावर्धत grew, कालाग्निरिव like the fire at the time of dissolution, जज्वाल burnt.

The windgod's association made the fire spread at great speed. It appeared like fire at the time of dissolution.