AlHijjah 14, 1433, Oct 30, 2012, SPA - Typhoon Son Tinh blew the roofs of thousands of homes in northern Vietnam, killing at least seven people and raising its death toll over the past week to at least 31. Vietnam's disaster agency reported Tuesday that the typhoon killed seven people, left five missing and injured 43 in the north. The typhoon's center did not make landfall before dissipating at sea Monday, but it blew roofs off more than 13,000 houses and damaged nearly 19,000 hectares (47,000 acres) of rice crops, according to a report of the Associated Press. Son Tinh was a tropical storm when it swept through the central Philippines last week, killing 24 people and leaving six others missing. It gained typhoon strength with sustained wind speeds of up to 149 kph (92 mph) as it crossed the South China Sea.