(CNN) -- A typhoon threatens to hit or brush southeastern coastal China on Wednesday, the China Meteorological Administration warned.
Typhoon Kompasu is expected to unleash rainstorms and powerful winds on Zhejiang province. Over the next three days, torrential rain also is expected in Fujian province, just south of Zhejiang.
Ships and fishermen off Fujian and Zhejiang have been urged to find shelter, the state-run Xinhua news agency reported.
Nearly 138,000 people in Fujian have evacuated.
In Shanghai, all Wednesday classes have been suspended for students in high school, primary school and kindergarten, Xinhua said. Shanghai is just north of Zhejiang province.
Typhoon Kompasu and tropical storm Namtheum had halted ferry service and stranded about 200 tourists on an island in Zhejiang, local authorities said, according to the news agency.
Shipping routes are to reopen once winds weaken, Xinhua said. Namtheum had weakened to a tropical low-pressure system by Wednesday.