(CNN) — Swiss authorities have said that a deadly fire at a ski resort bar in Crans-Montana, Switzerland, rapidly developed into a “flashover” – a dangerous phenomenon in which everything in a room ...

The New Year’s Day inferno that ripped through a crowded bar in southern Switzerland, killing at least 40 people and injuring 119, spread so rapidly because of what is known as a flashover, local ...

(CNN) — Swiss authorities have said that a deadly fire at a ski resort bar in Crans-Montana, Switzerland, rapidly developed into a “flashover” – a dangerous phenomenon in which everything in a room ...

(CNN) — Swiss authorities have said that a deadly fire at a ski resort bar in Crans-Montana, Switzerland, rapidly developed into a “flashover” – a dangerous phenomenon in which everything in a room ...

Swiss authorities have said that a deadly fire at a ski resort bar in Crans-Montana, Switzerland, rapidly developed into a “flashover” – a dangerous phenomenon in which everything in a room ignites ...

A Tulsa Fire Department recruit hoses down walls during flashover training Monday. Recruits go through the training so they can recognize signs of dangerous flashover fires before encountering one in ...