Heavy storms have killed about 14 people in Taiwan and 12 in Japan, while 1 million people have been evacuated in China.
Typhoon Morakot has wreaked havoc in Taiwan, causing the island's worst flooding in 50 years.
The Taiwanese military is trying to rescue thousands of people cut off by fallen bridges and raging rivers.
At least 32 people were injured as Morakot lashed the island with powerful winds and rain, disrupting railway and road traffic and bringing down bridges.
In central and southern Taiwan, heavy rain caused widespread floods and mudslides, particularly in the county of Pingtung, where thousands of people were trapped in three coastal townships.
In Kaohsiung county, a bridge collapsed, cutting off road access to a remote village of 1,300 residents.
Local television reported that 200 homes in the village, Hsiaolin, are believed to have been buried in a mudslide.
Television footage showed a hotel in Taitung, south-eastern Taiwan, collapsing into a river. Staff and guests had already been evacuated, the reports said.
On the Chinese mainland, a million people were moved to safety after the authorities saw the typhoon's impact on Taiwan.
According to Xinhua news agency, rescuers have been trying to reach a large cargo ship stranded in rough seas.
In Japan, the death toll from Typhoon Etau is also increasing after houses were destroyed by rising waters and mudslides.
Tokyo is being hit by winds of up to 108 kilometres an hour and forecasters say the heavy storms will strike the Korean Peninsula next.
stormboy
