A 59-year-old man was killed in Nghe An province when a tree fell on his house before the storm made landfall, police said.
Nghe An, which stretches from the coast to the mountainous Laos border, was among the areas hit hardest by heavy rain and floods. Another woman was swept away by floodwaters and remains missing. Four other people were injured.
Flooding damaged hundreds of homes, destroyed crops and cut off remote communities, officials said.
Nearly 400 households were evacuated from the province's landslide-prone areas, and several upland communities remain isolated without electricity or communication, officials said.
Heavy rains triggered landslides that damaged roads, collapsed part of a school building and destroyed crops and forest.
Wipha made landfall Tuesday morning with sustained winds of up to 102km/h before weakening as it moved inland. It caused power outages, disrupted farming operations and forced temporary airport closures in northern provinces.
In neighbouring Thailand, heavy rain from Tuesday night into Wednesday triggered flooding in several northern provinces, swelling rivers and inundating homes.
Authorities said more than 350 people were affected, though no casualties have been reported. They warned of possible flash floods and landslides.
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