Its believed that certain events will happen before actual coming of Judgment Day e.g. sun rising from west, beast, smoke, landslides… But what do these events have to do with actual Judgment Day & the decision of whether one will go to heaven OR hell, which depends upon a person's deeds,

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 is His slave and Messenger.

There is no doubt that what will be taken into account in regard to the Hereafter are the deeds of the person; if he did good deeds, he will find good and if he did evil deeds, he will find evil. Allaah Says (what means): {Then as for one whose scales are heavy [with good deeds]. He will be in a pleasant life. But as for one, whose scales are light. His refuge will be an abyss. And what can make you know what that is? It is a Fire, intensely hot.} [Quran 101:6-11]

However, among the signs of the Hour, there are some signs that will have an effect on the human being and his acts, among which are the (supernatural) acts that the Dajjaal (the Anti-Christ) will perform which will tempt some people. It is for this reason that the Prophet ordered us to seek refuge (with Allaah) from the tribulations that he will bring.

The same thing applies to the rising of the sun from the west. When the sun rises from the west, the door of repentance will be closed and the belief of those who profess belief at that time (i.e. upon seeing the signs) would not be accepted from them. It is confirmed that Abu Hurayrah narrated that the Prophet said: ''The Hour will not come until the sun rises from the west, and when it rises from the west and the people see it, they will all affirm their faith but that time is a time when no soul will benefit from its faith (as long as it had not believed previously), and he recited the verse in which Allaah Says (what means): {The Day that some of the signs of your Lord will come no soul will benefit from its faith as long as it had not believed before or had earned through its faith some good. Say, “Wait. Indeed, we [also] are waiting.”}[Quran 6:158] [Al-Bukhari and Muslim]

Allaah Knows best.