Photo taken on Sept. 22, 2013 shows the sky is covered with dark clouds as super typhoon Usagi approaches in south China's Hong Kong. More than 400 flights have been cancelled or delayed as super typhoon Usagi hit Hong Kong on Sunday. The Hong Kong Observatory issued a No. 8 storm signal, the third highest level, at 6:40 p.m. on Sunday, saying Usagi would make its landfall in the evening. (Xinhua/Qin Qing) |