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Frontier guards and local police help reinforce fishing boats at a dock in the Luqiao District of Taizhou City, east China's Zhejiang Province. China's national observatory on Sunday upgraded the alert for typhoon Yagi from blue to yellow, as the typhoon is forecast to make landfall in the eastern coastal region Sunday night. (Xinhua/Jiang Youqin)

BEIJING, Aug. 12 (Xinhua) -- China's national observatory on Sunday upgraded the alert for typhoon Yagi from blue to yellow, as the typhoon is forecast to make landfall in the eastern coastal region Sunday night.

At 5 p.m., the center of Yagi, this year's 14th typhoon, was over the East China Sea about 235 km southeast of the city of Taizhou, Zhejiang Province, the National Meteorological Center (NMC) said in a statement.

It will move at a pace of around 35 km per hour towards the northwest with increasing force, and will make landfall in Zhejiang Province Sunday night, the center said.

Yagi will weaken after making landfall and continue to move northwest inland, the NMC said.

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

The NMC suggested local governments prepare for possible disasters, ships in affected areas return to port, and residents along the typhoon's path stay indoors until it passes.