Refugees and migrants arrive on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures. (Reuters)

Refugees and migrants arrive on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

Refugees and migrants arrive on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

A refugee screams for help after she and her daughter fell into the water after arriving on a dinghy from the Turkish coast to the northeastern Greek island of Lesbos, Friday, Oct. 2 , 2015. The International Organization for Migration says a record number of people have crossed the Mediterranean into Europe this year. (AP Photo)

Refugees and migrants arrive on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

A migrant girl is carried away as refugees and migrants arrive on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

A migrant man celebrates following his arrival on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

A migrant woman is helped following her arrival on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

Volunteers wrap children with thermal blankets shortly after arriving on a dinghy from the Turkish coast to the northeastern Greek island of Lesbos, Thursday, Oct. 1, 2015. The International Organization for Migration says a record number of people have crossed the Mediterranean into Europe this year, now topping a half a million as some 388,000 have entered via Greece. (AP Photo)

A refugee holding her daughter falls into the water after arriving on a dinghy from the Turkish coast to the northeastern Greek island of Lesbos, Friday, Oct. 2 , 2015. The International Organization for Migration says a record number of people have crossed the Mediterranean into Europe this year. (AP Photo)

A refugee is comforted by family members after arriving on a dinghy from the Turkish coast to the northeastern Greek island of Lesbos, Friday, Oct. 2, 2015. The International Organization for Migration says a record number of people have crossed the Mediterranean into Europe this year. (AP Photo)

Refugees and migrants arrive on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

Syrian refugee girls are wrapped with blankets following their arrival on an overcrowded dinghy on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

Refugees and migrants arrive on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

A refugee screams for help after she and her daughter fell in the water as they arrive along the northeastern Greek island of Lesbos, Friday, Oct. 2 , 2015. The International Organization for Migration says a record number of people have crossed the Mediterranean into Europe this year. (AP Photo)

Refugees and migrants arrive on an overcrowded dinghy in rough sea on the Greek island of Lesbos, after crossing a part of the Aegean Sea from the Turkish coast, October 1, 2015. A record number of at least 430,000 refugees and migrants have taken rickety boats across the Mediterranean to Europe this year, 309,000 via Greece, according to International Organization for Migration figures (Reuters)

A refugee prays shortly after he and other migrants arrived on a dinghy from the Turkish coast to the northeastern Greek island of Lesbos, Thursday, Oct. 1, 2015 The International Organization for Migration says a record number of people have crossed the Mediterranean into Europe this year, now topping a half a million as some 388,000 have entered via Greece.(AP Photo)