Earlier quoted context omitted.
> The mall had a (most likely gas) explosion If the internet searches are to be believed, that is indeed sadly likely to be the cause. The internet suggests the explosion happened on the second floor of the mall where a large food court is located.
A hundred years from now people are going to be absolutely flabbergasted how we just piped gas everywhere all the time. Electricity allows for so many more automatic safeguards.
I bought a house here in Japan last year and replaced the gas with all-electric due to concerns of not only leaks and disasters but also just in day-to-day use gas isn't good for indoor air quality.