Another massive dust storm called a haboob turned the sky brown in Phoenix, Arizona on Monday.
It was the second one to hit the area in two weeks.
The dust reduces visibility, irritates eyes and throats, leaves everything covered in grit and turns swimming pools into mud holes.
Experts say such storms only happen in Arizona, the Sahara desert and parts of the Middle East.
Pollution levels skyrocket during dust storms and create even more breathing problems for people with asthma and other similar conditions.
The dust also brings increases in a disease known as Valley Fever, a fungal pneumonia. Valley Fever thrives in the hot and arid Southwest in dirt found just a few feet beneath the earth’s surface; it can be stirred up by construction, wind and other activity.
Compelling footage was quickly shared on social networking websites Facebook, Twitter and YouTube. Watch some of the user submitted footage below.
VIDEO – Haboob consumes south Phoenix, Arizona on July 18, 2011
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VIDEO – Arizona Dust Storm
VIDEO – Dust Storm on Arizona
Another giant dust storm in Arizona caught worldwide attention on July 5. That storm brought a mile-high (1.6-kilometre) wall of dust that halted airline flights, knocked out power for hundreds of people and turned swimming pools into mud pits. A time-lapse video footage of the massive dust storms, ‘Driving into AZ Haboob Dust Storm HD‘ went viral with almost 1.5 million views to date.
VIDEO – Driving into AZ Haboob Dust Storm HD
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