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.

Three people have been killed and at least 13 others injured in a typhoon in Vietnam, authorities said. Typhoon Kajiki hit Vietnam 's north central coast on Monday, damaging nearly 7,000 homes, felling 18,000 trees and flooding thousands of hectares of rice plantings.