HANOI - At least four people died as Typhoon Kai-Tak barrelled across Vietnam bringing high winds and floods to several areas including the capital Hanoi, authorities and a report said. The typhoon, which made landfall late Friday, was downgraded to a tropical depression but continued to dump water on already flooded parts of the country. A taxi driver was killed when high winds caused a tree to fall on his car in Hanoi, while two others died from electric shock after a cable was felled in northern Son La city, according to an update from the national flood and storm central committee. In Bac Giang province a 46-year-old woman died after soil from a partially collapsed hill buried her house in the middle of the night.