VOV.VN - Typhoon Matmo strengthened to level 12 winds (118-133 km/h), gusting to level 15 (over 170 km/h), moving west-northwest at about 25 km/h on the afternoon of October 4, and is forecast to hit the northern coast of Vietnam, bringing strong winds, heavy rain and flooding risks to six provinces from Quang Ninh to Hung Yen in the coming days.