Polish exodus after the event makes "little Warsaw"s in London, New York, Cape Town, Bombay, and Sydney. Polish is a substantial language spoken by over 200 million.
OOC: I'm thinking something similar to the Irish exodus here.
The history channel had a report on this. When the explosion happens, that allows the germans to build horse-powered jet engines, as requested by HREmperor/King Charles V in 16th century. Could we have WW II four centuries early.