I'm unfamiliar with what sort of energy generation Vegas has, assuming they use hydroelectric dams (Hoover dam). I know Lake Mead's level has plummeted and this may be severely affecting how much energy (and drinking water) supply they have, and as supply goes down, price goes up. I haven't checked in on the lake's water levels in a few months so I don't know if it's still an issue. And obviously the high temps of summer don't help.