Typhoon Fitow hit eastern China early Monday with winds of up to 124 mph, the National Meteorological Center reported.
At least five people are reported killed and 4.5 million impacted, state media reported.
Authorities evacuated hundred of thousands of people on Sunday as Fitow approached the mainland, with tens of thousands of boats called back to harbor, bullet train services suspended and many flights cancelled.
The National meteorological Centre (NMC) issued a red alert, the highest, for the storm as it moved towards the coast.
According to China’s state news agency, Xinhua, the typhoon cut power in towns and counties in Zhejiang province near China’s commercial hub Shanghai, which saw almost 11 inches of rain over 17 hours Sunday to early Monday. Dozens of high-speed rail services in the region were suspended and at least 27 flights out of Wenzhou airport in Zhejiang were canceled on Sunday.
The typhoon had affected over three million people in Zhejiang and caused economic damage of over $330, Xinhua said, citing the provincial flood control office.
In Fujian province another 210,000 people were affected, Xinhua said. China News Service reported areas in that area saw up to 16 centimeters of rain.
In the hard-hit Cangnan County in Wenzhou, more that 1,200 homes collapsed, with damages amounting to hundreds of millions of yuan, China National Radio said.
Over the weekend the authorities drafted the army to help strengthen flood defences, the BBC’s John Sudworth in Shanghai reports.
Japan was bracing for another storm Monday, Typhoon Danas, which is on course to hit the archipelago, while China said Danas would likely bring more rainstorms to already affected areas.
Packing winds of up to 112 mph near its center, Danas was churning northwest towards the southern Okinawa island chain Monday, and was expected to reach a point off the western coast of Kyushu island by early Tuesday.
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