More than 90 people have died across the Continent, 10 of them in a single day in Poland, where the winter death toll now stands at 79.
Air, rail and road transport has been severely disrupted.
But Eurostar resumed a limited service and flights restarted from Frankfurt airport - Europe's third-biggest - after it was closed overnight.
The disruption has come during the busy Christmas holiday season, affecting many people's travel plans.
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