>We're talking about Nevada, not the world.

Well, I gave examples from Boston, California, and elsewhere. And it's not like parts of Nevada fair better:

  Despite such efforts, the shortage of medical 
  professionals is so serious in the Esmeralda County town 
  of Goldfield that 32-year-old Danie Johnson and her 55- 
   year-old mom, DeEtta Sligar, run a volunteer ambulance 
  service for the town’s roughly 300 residents.

  With no medical clinic in town and the nearest hospital 
  more than 110 miles away in Bishop, California, Johnson, 
  Sligar, two other EMTs and four drivers spend hours at a 
  time ferrying ill residents across the border. They 
  receive $132,058 a year from the county to keep their 
  ambulance and an old backup running.

That's par for the course for rural places everywhere. But ambulance shortages are there even in the biggest of cities (it's matter of state recourses and proportion of ambulances and medical pros to the population, not an absolute matter of population size).