When responding to a fire, most firefighters would not expect a small avalanche as a peril though it is hard to see how the danger was not obvious for this firefighter. Nevertheless, he went to rescue people in the fire and his colleagues ultimately rescued a child. The firefighter is thankfully doing well and was close to falling four stories after the hit.
The firefighter was enormously fortunate to have fallen in a way that caught his foot in the ladder.
Looking at the video, I am not sure what the firefighters could have done since time was of the essence to save people.