If it wasn't hot days maybe, and no welding work close to combustible materials, then what you notice (but not 'just' only), then not 'confined and contaminated

If it wasn't hot days maybe, and no welding work close to combustible materials, then what you notice (but not 'just' only), then not 'confined and contaminated' (9:45) in the chain of failures.. That's why my question (†) - if it could be really avoidable at the last moment, as the video suggest. (†) https://news.ycombinator.com/item?id=25154599 https://news.ycombinator.com/item?id=25154599