The dust hanging over Sydney had largely cleared by midafternoon, although national carrier Qantas said severe delays would last all day because of diverted and late-running flights.

• 下午三时左右，悬浮在悉尼上空的大部分尘土已散去，尽管国家航空公司说有由于分神和航班的晚点，可能有的严重的延迟一整天。