 The script was jointly written by Kumar and David Brooks Miller . In order to present the correct technical and medical facts in the film , Kumar analysed documents of the court proceedings , forensic evidences and interviewed several survivors of the tragedy and also the staff members of the Union Carbide plant . Bhopal Group for Information and Action and many activists fighting for the rights of the victim of the disaster wanted to stop the film 's screening , called it an insult to the victims , blamed the filmmakers of distorting the facts related to the disaster , diverting attention from Dow Chemical Company which acquired Union Carbide in 2001 and for portraying Anderson as a person who wanted to help the people but was unable to do so . Sheen denied these allegations and said that he did not sympathise for Anderson . Kumar also denied these allegations and said that the organisations had seen an older script . He added that making the film was a life @-@ changing experience for him . A Prayer for Rain was added to the film 's title because had it rained on the night of 2 — 3 December 1984 , fewer people would have died . 
