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总结
瑞士瓦莱州克朗蒙大拿一处滑雪度假区酒吧在跨年夜发生致命火灾，媒体称遇难者约40至47人。调查信息显示，火势可能由香槟瓶上的烟花棒或类似火花引燃可燃物，并在短时间内发生“闪燃/全面燃烧”（flashover），导致室内迅速被高温与浓烟吞没。网络流传视频把矛头指向天花板隔热泡沫等材料的可燃性与合规性，检方和相关部门正核查起火原因、装修材料是否达标及可能的刑责与监管漏洞，引发对室内烟花、节庆活动与场所消防安全的讨论。
正文
Ceiling foam behind Swiss bar fire that killed 47? Viral videos spark buzz India Today The Swiss ski resort blaze quickly developed into a 'flashover,' authorities say. Here's what that means CNN New Year's Eve sparklers may have caused deadly Swiss bar fire: Official Al Jazeera Switzerland resort fire 'likely started by sparklers in champagne bottles', says attorney general - live updates The Guardian Switzerland ski bar fire that killed 40 likely started by sparklers on champagne bottles, officials say BBC
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