(LESBOS, Greece) — Dead migrants float belly-up, stripped of their clothing by churning seas. On shore, wailing women search for loved ones among the shivering, wide-eyed survivors. A rescuer tries to revive a toddler who lies unconscious in her sodden striped sweater. The scenes bring home a sobering reality: While the flow of migrants into Europe tends to abate as winter nears and the journey becomes more dangerous, this year it has only risen as thousands of people brave death in raging seas and freezing temperatures. On the beaches of Lesbos, children who looked as young as 4 appeared to be in shock as rescuers wrapped them with blankets to protect against the cold.