Typhoon Ketsana roared into central Vietnam on Tuesday, killing at least 23 people as it brought flooding and winds of up to 90 mph (144 kph), disaster officials said. Some 170,000 were evacuated from its path. Ketsana left more than 200 dead across the northern Philippines as a weaker tropical storm. After gathering strength over the South China Sea, the typhoon made landfall in midafternoon, about 37 miles (60 kilometers) south of Danang, according to the National Weather Center.