Theologians have a name for a fire of this sort; they often call it a “theophonic” fire. A theophonic fire is a place where God speaks and where His voice is clearly heard. God will use anything and everything, including a burning thorn bush, to grab your heart and your attention. God will speak to you from the fire; will you listen to His voice? There are more theophonic moments in life than we can imagine, but often we ignore them and turn away from the fire to escape it. God is speaking . . . He has arrived, He is not silent.
From my youbible devo refining fire