Phoenix dust storm

This time lapse video, constructed from images taken on a hill at Sun Ray park in Ahwatukee, Phoenix shows a huge dust storm, known as a 'haboob', descending on the city on the evening of 5th July.

The storm, which was estimated to be more than 100 miles wide, halted flights, knocked out power to nearly 10,000 people and fouled up thousands of swimming pools.