What happens if you go to the local Fire Station and they are on a call or some other duty?

Even with an unacceptable 911 delay of several minutes,,Multnomah County still receives  one of the best paramedic response times from AMR as compared to most big cities in the US. 

AMR beats the very difficult to comply with, NAFPA rule 1710 regarding response times,, while most jurisdictions strive or wish they could get even close.