It’s Likely That a Flashover Occurred During the Swiss Bar Fire.

Well, new fear unlocked (https://www.nytimes.com/2026/01/02/world/europe/switzerland-resort-bar-fire-flashover.html):

In a flashover, a flame can spread from a candle to a sofa, then to the carpet and the rest of the room in three to five minutes, depending on the type of materials involved, Mr. Kerber said.

It would burn the people inside too.

Even a firefighter in full protective gear would be unlikely to survive a flashover.