It looks catastrophic, the video of the man in the back ally just looks insanely scarey.
It almost looks as if it was from a found footage movie, unbelievable!

Its not quite "as bad" as it looks - the shockwave is travelling fast down the narrow alley ways between the buildings, etc. taking everything light weight with it making it look like the building are coming apart more than they are... still a good chance of serious injury or death though.
Man you would seriously just think that was a nuke or an alien attack or something. I'd be waiting for the shockwave like you see in movies and certain doom![]()
A disaster of unspeakable magnitude! Let's just hope this was an accident and not something malicious which it could well be![]()

Hmm it could be a warehouse containing many 'interesting' products such as fertiliser.
However typically to get a big shockwave you need high velocity explosions - compressed volatiles becoming a fuel-air mix or high explosives.
US had an ammo explosion: https://en.wikipedia.org/wiki/Port_Chicago_disaster
NASA fuel factory had a big bang:
Watch the white factory top left.