- Bhopal Gas Tragedy occurred on 2–3 December 1984 in Bhopal (MP).
- Chief Minister (MP) → Arjun Singh.
- Governor (MP) → K. M. Chandy.
- Prime Minister (India) → Rajiv Gandhi (took office 31 Oct 1984).
- President (India) → Giani Zail Singh.
- Gas leaked → Methyl Isocyanate (MIC) from Union Carbide plant.
- Nature → World’s worst industrial disaster.