Fishing boats stay in a harbor to avoid typhoon Usagi in Xinbei City, southeast China's Taiwan, Sept. 20, 2013. The meteorological department of Taiwan issued warning on Typhoon Usagi on Friday, and forecasted heavy rainstorms and potential floods in many areas of Taiwan. (Xinhua/Lu Peng)

Dark clouds shroud Taipei City, southeast China's Taiwan, Sept. 20, 2013. The meteorological department of Taiwan issued warning on Typhoon Usagi on Friday, and forecasted heavy rainstorms and potential floods in many areas of Taiwan. (Xinhua/Lu Peng)

Fishing boats stay in a harbor to avoid typhoon Usagi in Xinbei City, southeast China's Taiwan, Sept. 20, 2013. The meteorological department of Taiwan issued warning on Typhoon Usagi on Friday, and forecasted heavy rainstorms and potential floods in many areas of Taiwan. (Xinhua/Lu Peng)