Although every school runs fire drills, the unfortunate reality is that some buildings are easier to escape from in the event of a fire than others.
And the higher up somebody lives, the more difficult their descent could be depending on how the fire spreads. After all, the cause of a fire isn't usually known until an investigation after the fact so there's often no telling where it's already present when you're in the heat of the situation.
That nightmare scenario devastated one Arizona family, but it's thanks to the actions of some heroic bystanders that the results weren't even more tragic.