https://en.wikipedia.org/wiki/List_of_emergency_telephone_nu...
In Europe many of them are variations of 1XX, but since there are so many and sometimes they change too, it's not trivial to remember which one.
The American 911 is more memorable, even in Europe, simply due to it appearing in popular culture so often, I hope that if someone dials that one in Europe it'll also get forwarded to a real emergency line.