BEIJING — China's national observatory on Sept 5 renewed a yellow alert for Hinnamnor, the 11th typhoon of the year, as it is moving closer to eastern China.

The typhoon, observed on waters 245 km southeast of Zhujiajian Island in East China's Zhejiang province at 5 am, will proceed northward at a speed of 20 to 25 km per hour with slowly decreased intensity, the National Meteorological Center said.

Some areas in Jiangsu, Zhejiang, and Shanghai are expected to see moderate to heavy rains from 8 am on Sept 5 to 8 am on Sept 6 due to the typhoon, with some regions receiving up to 80 millimeters of precipitation, according to the meteorological center.

Ships and boats have been urged to take shelter at harbors and relevant areas have been asked to prepare for rescue and relief work.

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