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This disaster exposes catastrophic regulatory failure in Switzerland. Flammable soundproofing materials and indoor fireworks should never have been permitted in any licensed venue. Canton authorities failed to enforce basic fire safety standards, allowing unacceptable, dangerous conditions to exist.
The tragedy resulted from a specific accident when sparklers on champagne bottles ignited ceiling materials during a celebration. A single narrow staircase exit turned a flashover into mass casualties as panicked patrons couldn't escape the basement venue quickly enough. This heartbreaking incident transformed a night of celebration into unimaginable horror.