Quite apart from the dangers of hydrogen, zeppelins handle bad weather only so well. The US Navy had a couple of large zeppelins in the 1920s. They used helium,

Quite apart from the dangers of hydrogen, zeppelins handle bad weather only so well. The US Navy had a couple of large zeppelins in the 1920s. They used helium, but both, as I recall, were damaged and lost in storms.