Arizona was hit by its second giant dust storm in two weeks yesterday, turning the sky brown, delaying flights and causing mayhem for motorists.

The dust storm, known as a haboob, formed in Pinal County and headed north-east, engulfing Phoenix at about 5:30 pm.

The monster dust wall was about 3,000 feet high and created winds of 25 to 30 mph, with gusts of up to 40 mph.

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