“Suicide (Latin suicidium, from sui caedere, “to kill oneself”) is the act of an organism intentionally causing its own death. “
These people did not intentionally cause their own deaths. They chose (in some cases) the lesser of two evils. They were in that “fight or flight” moment (absolutely no sick pun intended).
My religion says suicide is wrong. I think in these cases, God would not count them as suicides, but rather as very brave people..heroes. They were, as the article says, homicide victims.
Even in religious structures that say suicide is wrong, this cannot be counted as suicide. Those people were already dead; the only question was what would kill them first. Fire is an extremely painful way to go, gravity is not.
This is no more suicide than World War II sailors trapped in an inverted sunken warship compartment with the water rising, no hope of rescue and loaded sidearms. And no less honorable.