A devastating fire at the Le Constellation bar in Switzerland's Crans-Montana ski resort on New Year's Day killed 47 people and injured 115. Witnesses reported sparklers in champagne bottles near the wooden ceiling may have ignited the blaze, suggesting human negligence. Authorities are investigating the fire's origin and whether safety protocols were followed. Identifying the victims will take weeks, and the incident is being compared to similar past tragedies involving pyrotechnics.