exhalt,
1. Certainly a hydrogen plant explosion is a not a good thing..
2. But things like that happen not so infrequently - I lived in Texas near Baytown, Pasadena (nick name stink a dina) and there are many refiners in that general area - big time explosions - not an infrequent thing good thing especially when life is lost
3. There have been 3 very significant issues with nuclear reactors, Chernobyl (Russia), Three Mile Island (USA) and Japan (Fukushima).
4. Thousands of LP/Gasoline filling station explosion in the USA
5. People get electrocuted by lightning, fallen electric lines etc.
In a nutshell things happen but life does go on.
6. But as I've stated before there are hazardous issues with ammonia too. - the one thing you can't ever eradicate is the "human factor" in many of these tragedies.