Shanghai plans to suspend all passenger trains along the coast on Friday and Saturday as Typhoon Chan-Hom approaches, the Shanghai Railway Bureau said on Wednesday.

It is forecast that Typhoon Chan-Hom will begin to affect the Yangtze River Delta on Thursday. It could make landfall in Zhejiang Province on Saturday morning, according to the latest meteorological advisory.

Meanwhile, 15 counties in south China's Guangdong Province have issued a yellow alert for another approaching Typhoon, Linfa, closing elementary and middle schools.

Linfa is expected to hit the coast of Fujian and Guangdong Provinces on Wednesday night.

As of 12 p.m., Typhoon Linfa's center is in the South China Sea about 280 km southeast of Shantou City in Guangdong Province. It is forecast to move northwest at a speed of 10 km per hour.

Rainstorms are expected in the eastern parts of Guangdong Province from Wednesday to Thursday.

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