At least six people died in Poland and the Czech Republic and dozens were injured after heavy storms and torrential rain felled trees, electricity poles and ripped off roofs.
Five people died across Poland - four of them killed by uprooted trees, officials told the PAP news agency. One person drowned in the southeastern region of Wroclaw, the country's fourth largest city and the capital of Upper Silesia.
The private TVN24 television channel put the number of deaths at seven but this figure was not officially confirmed.
Dozens were injured, including 17 who were electrocuted by a fallen high tension cable in the western area of Krotoszyn.
Officials said winds packing up to 100 kilometres an hour prised off rooftops and disrupted traffic across a vast swathe of Poland. Several trees were uprooted in the capital Warsaw.
A 75-year-old woman died and several people were injured by falling trees in heavy storms in the Czech Republic last evening, the CTK news agency reported.
The fatality occurred in northern Hradek nad Nisou. A boy and a man suffered heavy injuries in the same region.
Trees also damaged electricity lines and disrupted rail traffic in several places, including the capital Prague.
A woman in the Czech Republic's north suffered a head injury from a metal billboard ripped off by the wind. A yacht sank in a lake in the north and a boat capsised in a river south of Prague, with four people rescued and one missing.