Most of the people onboard survived the Hindenburg disaster.
Hydrogen rises, burning hydrogen rises even faster. While it made one hell of a fireball, the people actually below the gas bags were in (relatively) little danger.
Also interestingly, the most deadly airship accident was the the loss of the helium using USS Akron four years earlier.
(Which raises the question of why does everyone know about the Hindenburg, but few know about the Akron? The Hindenburg disaster is not historic because of the disaster itself, what made it historic was that it is the beginning of the rise of news media ubiquity. It’s the first major disaster that was recorded as it happened and shown in both video and live(recorded for radio) commentary to the world.
Were it not for the film and commentary, it would just be another footnote in the question of why nobody uses zeppelins.)