It's monsoon season in Arizona, which also means it's dust storm season.


Every year, clouds of dust roll over the state, severely limiting visibility, knocking out power and grounding flights.

Below, watch a massive dust cloud roll over Phoenix in the clip below from Russia Today, embedded via YouTube.

[youtube http://www.youtube.com/v/8W4Cx44XKZ4?version=3&hl=en_US expand=1]