Corrected entry: The amount of sand seen covering various Las Vegas buildings would have taken hundreds if not thousands of years to accumulate to reach the depths portrayed in the scene - far more time than what the storyline has occurred in.
jerimiah
28th May 2009
Correction: Not really. A few good storms, and all the wind they bring with them, would do the job just fine.
Phixius ★
No it wouldn't. That amount of sand would take more than a couple of years.