Applying in multiple Big 4 locations at once?

I will soon be applying to the Big 4 as an experienced hire.  I have decided on the practice area I want to apply for and narrowed my preferred location down to 4 cities across the US.

My question is, can I contact Big 4 in-house recruiters in each of these cities at once?  Will it raise red flags if they see that I am applying to multiple locations?