Vietnam announced plans to evacuate more than half a million people and ordered boats to stay ashore, while the southern Chinese city of Sanya closed businesses and public transport on Sunday as both braced for an intensifying Typhoon Kajiki.

Typhoon Kajiki has brought strong winds and heavy rain to southern China's Hainan island and parts of Guangdong province.

Vietnam and China are evacuating hundreds of thousands of people, grounding flights and closing businesses as Typhoon Kajiki intensifies in the South China Sea.