82فَلَمَّا جَآءَ أَمْرُنَا جَعَلْنَا عَـٰلِيَهَا سَافِلَهَا وَأَمْطَرْنَا عَلَيْهَا حِجَارَةً مِّن سِجِّيلٍ مَّنضُودٍ
83مُّسَوَّمَةً عِندَ رَبِّكَ ۖ وَمَا هِىَ مِنَ ٱلظَّـٰلِمِينَ بِبَعِيدٍ
[82-83] Accordingly, when the time of the execution of judgment came, We turned the habitation upside down and rained on it stones of baked clay,91 and each one of these stones had been specifically marked92 by your Lord. And such scourge is not far from the workers of iniquity.93
91Probably the scourge came in the form of a horrible earthquake which turned their habitations upside down and the explosion of a volcano which rained stones on them.
"Stones of baked clay" probably refers to the stones that are formed by the underground heat and lava in the volcanic regions. The signs of such a formation are found even today near the Lot Sea.
92That is, "Every stone had been specified by Allah to do some particular work of destruction there, and to hit a particular offender".
93This was meant to warn the workers of iniquity who were engaged in their evil work, as if to say, "You should not consider yourselves immune from scourge as though it were far from you. If it could visit the people of Lot, it could overpower you as well. Neither the people of Lot were able to defend themselves against Allah, nor can you frustrate Him now.