A boat carrying tourists capsized during a sudden thunderstorm in Vietnam on Saturday afternoon during a sightseeing excursion, killing 37 people, state media reported.

A Vietnamese man who survived the capsizing of a tour boat in Ha Long Bay described his escape from the overturned vessel.

Weather conditions are expected to worsen in the coming hours with the landfall in northern Vietnam of Typhoon Wipha, which skirted the southern Chinese coast over the weekend causing flash floods an...