Despite wintry conditions, thousands of people fleeing war and misery are still embarking on the dangerous sea journey to seek a better life in Europe.
In a stark illustration of the high cost of the voyage, Greek and Turkish coastguards recovered the bodies of 45 migrants -- including 20 children -- whose boats capsized on their way to Greece, officials said today.
Greek rescuers pulled 74 people to safety after two boats ran into trouble off the Aegean islands of Farmakonisi and Kalolimnos in the early hours.
Of the survivors, "most are in a state of shock. There were families on board and in some cases only the father survived," UNCHR official Marco Procaccini told AFP.
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Charity Doctors without Borders (MSF in its French acronym), which is providing psychological care to survivors of the Kalolimnos shipwreck, described the horror on its Twitter account, saying "one man lost his pregnant wife and two kids, a 17-year-old lost his brother, an entire family was swallowed by the sea."
The UN refugee agency said smugglers were offering desperate migrants discounts to lure them out.
"Newly arriving refugees told UNHCR that the smuggling rates had halved in recent days. This discount acts as a grim enticement to take extraordinary risks given worsening weather," the agency said.
Despite deteriorating weather, the Greek islands were witnessing a surge with more than 3,000 people arriving daily in the last 48 hours, it said.
Europe has been battling to resolve its biggest migration crisis since World War II, but member states are split on what action needs to be taken.
"These deaths highlight both the heartlessness and the futility of the growing chorus demanding greater restrictions on refugee access to Europe," said John Dalhuisen, Amnesty International's Europe and Central Asia Programme Director.