Typhoon Nepartak has made landfall in eastern China with winds of up to 100 kilometres an hour and heavy rains after leaving three people dead in Taiwan the previous day, state-run Xinhua news agency says.
The city of Putian declared an emergency after 250mm of rain fell in just four hours on Saturday morning, Xinhua reported.
More than 100 trains were cancelled in the province and traffic was disrupted on the roads. There were no immediate estimates for the cost of the damage.
Three people died when Nepartak hit Taiwan on Friday and dozens were injured.
Prime Minister Lin Chuan visited the hardest-hit area of Taitung on the southeast coast of the island and met soldiers assisting with the clean-up efforts.
About 20,000 households were still without electricity in the city on Saturday and 8000 had no running water, Taiwan's Central News Agency reported.