The first thing that struck me while watching the video (in the article) is how low the ceilings are compared to the height the pyrotechnics display reached. From the videos (and comments under them) of this disaster elsewhere, it seems that such pyrotechnic displays are common in weddings and that the venue also has substandard and inflammable (non-fireproof) ceilings, lack fire extinguishers, fire exits, and other safety measures.