TAITUNG  - Typhoon Tembin swept across southern Taiwan Friday, toppling trees and ripping off rooftops after thousands of people were evacuated to avoid a repeat of a deadly storm three years ago. Tembin, characterised as a “severe” typhoon by the Hong Kong Observatory, hit before dawn and ground its way across Taiwan’s southern tip before moving out to sea again, where it was still lingering after dark. The typhoon left five people injured in its path, according to Taiwan’s Central Emergency Operation Centre. In Kaohsiung city in the south, a fire-fighter was electrocuted while handling a power cable ripped off by powerful winds.