Hundreds sounds like a massive overestimation to me. You're saying that every single day there are hundreds of comparable building fires around the world. If we conservatively take "hundreds" to be 200, that would be 200*365 every year. That's 73000 every year!
There is generically a far wider use in the US of combustible materials in buildings (compared to Europe) and this is probably only mildly balanced by the low density of housing (with the obvius exception of the relatively few big cities).
If we use these data:
https://www.usfa.fema.gov/data/statistics/fire_death_rates.h...
They are better than before: https://www.usfa.fema.gov/downloads/pdf/statistics/v12i8.pdf but not enough.
Between 3000 and 4000 deaths per year (out of a population of around 330 millons) is 0,001 % or 1 every 100,000,which is still very, very high.
Facebook is just spreading fear to make people more docile and suggestible.
It's just like terrorist attacks and winning the lottery. Sure, these things happen but they don't happen to you.
Facebook and the media love to pick out single unusual cases to make the world seem smaller and more dangerous than it is.
The world is massive, there are more people in it and more things happening than anyone can really appreciate.
While that one tower was burning in London there were probably hundreds of other buildings of the same size burning in other places around the world at the same time. Why does FB focus so much on that one small incident at the expense of all other incidents which actually add up to more? Cold statistics are just not as interesting as emotionally-charged outlier stories.