Don't know that were there any sand storm in Jaisalmer or anything else.
But during my recent journey, train was fully covered by dust. It was really challenging for travel in Non AC classes of this train. All berths cannot be made dirty by passengers. First time i was too much happy because my berth was middle berth and dust was not on that seat. Rest complete train was in horrible condition when i boarded at Ghaziabad on 26 March.