In Hong Kong, the nearby approach of Tropical Storm Koni forced the Hong Kong Observatory to issue the tropical cyclone warning signal No. 1, the signal of lowest urgency, for the special administrative region. Passing well south of Hong Kong, the strongest sustained wind associated with the storm in the region was an observation of winds in Tai Mo Shan. Ultimately effects in the Hong Kong area were limited to scattered squally weather producing isolated rainfall peaking at over 40 mm (1.6 in) in some locations. In Hainan, where the storm made landfall, 35 flights were delayed while 28 others were cancelled due to conditions onset by Koni. Ferry service across the Qiongzhou Strait was also halted, stranding 3,000 vehicles. As a result of Koni, heavy rainfall took place across Hainan, peaking at 189 mm (7.44 in) at a station on Wuzhi Mountain. In the province alone, at least 1,400 homes collapsed. Direct economic losses stemming from Koni in Hainan were estimated at CN¥140.27 million (US$16.9 million). In order to counteract the flight suspensions and cancellations caused by Koni, 198 flights from Meilan Airport were scheduled after the storm's passage.