Some people think that this wind and tongues of fire are the Holy Spirit Himself. But the Holy Spirit cannot be verified with the five senses. The wind and the fire they experienced were the manifestations of the angels that accompanied the Holy Spirit.
And of the angels He says, “Who makes His angels winds, and His ministers a flame of fire” (Hebrews 1:7, NASB).
There the angel of the LORD appeared to him in flames of fire from within a bush. Moses saw that though the bush was on fire it did not burn up.(Exo3:2, NIV)
Jesus promised that when the Holy Spirit comes upon the believers, they would receive power (Acts 1:8). So when the Holy Spirit came upon the disciples, mighty rushing wind and divided tongues as of fire also came upon them. What people saw was not the Holy Spirit Himself, but the manifestations of angels. So according to what happened at the Pentecost, when the Holy Spirit comes, angels arrive with Him and begin to empower the saints to accomplish God’s will.
I indeed baptize you with water unto repentance. but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire: (Matt 3:11, KJV)
In 1 Corinthians 3:12-15, it also says,
Now if anyone builds on this foundation with gold, silver, precious stones, wood, hay, straw, each one’s work will become clear; for the Day will declare it, because it will be revealed by fire; and the fire will test each one’s work, of what sort it is. If anyone’s work which he has built on it endures, he will receive a reward. If anyone’s work is burned, he will suffer loss; but he himself will be saved, yet so as through fire.
Therefore every tree which does not bear good fruit is cut down and thrown into the fire. I indeed baptize you with water unto repentance, but He who is coming after me is mightier than I, whose sandals I am not worthy to carry. He will baptize you with the Holy Spirit and fire. His winnowing fan is in His hand, and He will thoroughly clean out His threshing floor, and gather His wheat into the barn; but He will burn up the chaff with unquenchable fire (Matt. 3:7-12).
The Bible tells us that God will reward each person according to his deeds (Matt. 16:27; Rom. 2:6; 2 Tim. 4:14). These passages are not speaking to unbelievers. Unbelievers, regardless of their sinfulness, will all be cast into the lake of fire. These passages are referring to those who are already saved and will receive rewards in heaven according to their deeds.