More than a thousand rescue workers have been deployed in Vietnam . Hong Kong ( CNN ) -- The US has sent more troops to the region and is sending two warships into waters off Vietnam. Tropical Storm Son-Tinh had already killed at least 27 people in the Philippines .
More than a thousand rescue workers have been deployed in Vietnam . The US has sent more troops to the region and is sending two warships into waters off Vietnam. Tropical Storm Son-Tinh had already killed at least 27 people in the Philippines .