well, IF africanized bees do end up "everywhere", then that means even the feral bees living in city parks and neighborhoods will be taken over by them also, meaning that no matter what, they will be in the cities.
In which case, it would behoove northern beekeepers to learn how to work with africanized bees in the same manner the beekeepers in south and central america have already had to learn to do.
One can't run from the facts, only do the best one can to be prepared to deal with them.
Big bear