Editing The Post-Apocalyptic Roadmap/Nevada (section)

=Southern Nevada=  

Southern Nevada is mostly devoid of civilization, with the major exception being the Clark County area, home to Las Vegas... and also Nellis Air Force Base. Nellis AFB is home to the USAF Air Warfare Center, and as such, a major training center for both U.S. and foreign aircrews. With it's varied roles, Nellis is home to more squadrons than any other Air Force base. It was a huge target. Nellis itself is pretty much glass. It's surrounding areas are also fairly glassed, or flattened rubble. 7 nautical miles away, lies the greater cities of North Las Vegas, and Las Vegas. It's all a mix of rubble and empty buildings. Miraculously, the renowned Stratosphere still stands. Stained with blast marks and slightly listing away from the blast. It seems to be a symbol of defiance for anyone left in the area. 

Apparently they didn't think to hit the Strip itself, thinking that glassing Nellis AFB would be enough. It pretty much has. Anyone left alive, is likely raiding the food stores of the various casinos and hotels, or hiding out in public areas. Surviving national guard troops, mixed with men from many of the local security companies have fortified any large public structures.

However, being in the middle of a Desert, the basin would soon become uninhabitable. Any survivors would probably be best to pack up and head towards L.A. or if they really wanted to feel lucky, head north for Carson or Reno/Sparks, as either of them would probably end up better seats of power in the Free State of Nevada.

All Above ground water sources would be contaminated. Specifically Lake Mead. All ruined. And since Lake Mead is the main water source for Clark County(well, ONLY) the entire area wouldn't last very long. If you're here, and survive, Your best bet is to either Wait and die, or head towards L.A.

For whatever reason, the Hoover Damn was not targeted and remains functioning. As such, power is still available in the area.

Also, somehow, Talk Radio personality Art Bell, of Coast to Coast AM has survived. His sporadic radio transmissions warn survivors to abandon the area due to the contamination of Lake Mead. His later transmissions seem to suggest that he is slowly dying and sound more frantic and frightened.

tl;dr, If you were in Clark County on vacation, or live there, You're in a desert with contaminated water and food with nothing around for miles and miles around. You're pretty much screwed.