Firefighters are still waiting for answers about the tragic circumstances that led to the death of Izabella Nash and the injuries of Lia Drew in an industrial fire south of Brisbane on May 2.
Dual investigations into the incident are being run by the police and Workplace Health and Safety.
United Firefighters Union secretary John Oliver said it was hard to comprehend the 46-year-old's death because dealing with fires like the one at Slacks Creek is not unusual for firefighters.
"This one didn't look out of the ordinary, so that's why I'm a little bit confused to understand what happened inside," he said.
"I saw the fire as something that would be dealt with by those crews in a regular fashion.
"It didn't seem to me to be too out of the ordinary, the crews that were there are exceptionally good operationally, they're a well experienced crew.
"I'm told there was an enormous amount of heat, obviously you get heat with a fire but these crews are used to dealing with that."
Mr Oliver said it was too early to speculate, but said the investigation would look for "themes".
"If you look at fires where firefighters' lives are lost, there's usually themes that go around those things that lead to a tragedy."
"What happened at that fire? What made that fire so different? I guess the investigation will bring that out," he said.
Izabella Nash was recognised for her service at at a public memorial yesterday attended by much of the firefighting community.
Three weeks after the tragedy, Lia Drew remains in the Royal Brisbane and Women's Hospital's burns unit, receiving treatment to both her arms and her shoulder.
Mr Oliver said Ms Drew has a long road to recovery ahead of her.
"We're just making sure that she's being visited by members of the union, the firies themselves and keeping in touch with her to make sure her mental resilience keeps up there for the battle that she's got," he said.
