Powerful waves roar over a barrier, scaring spectators along the Qiantang River in Hangzhou, Zhejiang province, Sept 28, 2015. [Photo/IC]

BEIJING?-?China's top observatory on Monday renewed an alert for approaching super typhoon Dujuan, which will bring gales and rainstorms to southeastern regions in the next few days.

Dujuan, the 21st typhoon of the year, will land in Taiwan Monday afternoon and the coastal province of Fujian Tuesday morning, the National Meteorological Center (NMC) said in a statement.

The typhoon will bring gales and storms to some parts of Taiwan, Fujian and neighboring Zhejiang province in the next two days, prompting the NMC to renew an orange alert for the typhoon.

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

The NMC advised local authorities to take precautions against the typhoon and prepare for possible floods and geological disasters. Residents in affected regions should alter their travel schedules based on latest forecasts.

After landing in Fujian, the super typhoon will weaken rapidly and be downgraded to a tropical depression after reaching Jiangxi province Tuesday night, the center said.