I read a Hadeeth saying that there will be a fire emerging from the east that is one of the signs of the final Hour. Will you please elaborate on this?

All perfect praise be to Allaah, the Lord of the worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and messenger.

Anas narrated that when ‘Abdullaah Ibn Salaam was informed of the Prophet’s, sallallaahu ‘alayhi wa sallam, arrival in Madeenah, he came and asked him, sallallaahu ‘alayhi wa sallam, about three things that no one except a prophet would know. One of these was about the first Sign of the final Hour and the Prophet, sallallaahu ‘alayhi wa sallam, told him that it would be a fire that would gather people in crowds from the east to the west. [Al-Bukhari]

Allaah Knows best.