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Australian dust storms

By: Catie Leary on Oct. 16, 2009, 11:23 p.m.
A man wears a scarf as a mask in the central business district of Sydney

Photo: Brendon Thorne/Getty Images

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A bad day for breathing

A man wears a scarf as a mask in the central business district of Sydney on Wednesday, when more than 200 people called emergency services with breathing difficulties. The official air quality index for New South Wales recorded pollutant levels as high as 4,164 in Sydney. A level above 200 is hazardous.