People walk among debris of fallen tress at Tacloban airport in the aftermath of Super Typhoon Haiyan in Philippines.

China has issued an orange alert, the second-highest warning in its weather system, to prevent damage as Typhoon Haiyan hit the Chinese coast after killing over 10,000 people in the Philippines.The State Flood Control and Drought Relief Headquarters has asked provinces of Hainan and Guangdong as well as Guangxi Zhuang Autonomous Region to keep a close eye on Haiyan and upgrade their precautions.Haiyan, the 30th and strongest typhoon to hit China this year, arrived at 6 pm yesterday at the eastern area of South China Sea, 370 km to the southeast of Sansha city, Hainan, after having wreaked havoc in the Philippines.It will move northwestward at a speed of 30-35 km per hour, the headquarters said.The central and southern parts of Hainan and Sansha city are expected to be hit by downpours as Typhoon Haiyan approaches, the headquarters said.All fishing boats were urged to return to ports by noon yesterday.As of last night, most had returned, with a few still on their way back, state-run Xinhua news agency reported today.

China has a four-tier, colour-coded weather warning system, with red representing the most severe, followed by orange, yellow and blue.