For more on Elijah’s bringing ‘more fire’ from heaven, please see this article.
This chapter is quite dramatic but real. The first verse starts like this “when the Lord was about to take Elijah up to heaven in a whirlwind,’ and that is what is this chapter all about: Elijah being taken up alive to the presence of the Lord without facing or tasting physical death like any a human.
Elijah keeps moving from place to place and Elisha (whom the Lord aointed to succeed him) keeps following him wherever he went: Bethel, Jericho, and finally Jordan where Elijah was taken up after a chariot of fire and horses seperates them both from each other as they cross the Jordan afoot.
Elisha had no doubts whatsoever about this miracle of being taken alive though the company of the prophets still suspected that Elijah would be in some other place, verse 16.