I refer to Perets Mett's posting about the fire which
destroyed a third of Oswiecim and caused a massive
emigration of Jews to Germany.
The same happened in Brzesko(Galicia) in 1904 where
95% of the Shtetl was destroyed by the fire.
The Yizkor book of Brzesko (in Yiddish)is full of
references to that fire.It also caused to a mssive
emigration(including my mother's family Koenigsbuch)
to Krakow and Germany and this is how some of them
It seems that fires,not only Antisemitism was a factor
in the massive movements of Jews