SB 10.17.21
tada suci-vanodbhuto
davagnih sarvato vrajam
suptam nisitha avrtya
pradagdhum upacakrame
Translation:
During the night, while all the people of Vrndavana were asleep, a great fire blazed up within the dry summer forest. The fire surrounded the inhabitants of Vraja on all sides and began to scorch them.
Purport:
Srila Sanatana Gosvami and Srila Visvanatha Cakravarti Thakura have commented that perhaps a loyal friend of Kaliya had assumed the form of a forest fire to avenge his friend, or perhaps the forest fire was manifest by a demon who was a follower of Kamsa’s.