KEY POINTS
  • Three million migrants have so far fled the war in Ukraine, with more than half going to Poland.
  • The influx is putting considerable strain on Polish authorities and humanitarian aid agencies, with questions arising as to how the European Union will provide support.
  • An inflow of 5 million migrants could cost the EU $55 billion in 2022 alone, according to the Economist Intelligence Unit.
  • But as the war continues, the movement of people could tick much higher.
A child greets from the window of a bus after crossing the Ukrainian border with Poland at the Medyka border crossing, southeastern Poland, on March 14, 2022.

In less than three weeks, Russia's invasion of Ukraine has sent 3 million people fleeing their homes to neighboring countries — with still millions more displaced domestically — in what has quickly become Europe's worst migrant crisis since World War II.

While the majority have been compassionately welcomed by host countries rejecting President Vladimir Putin's indiscriminate attack, the sudden influx of people is having a profound impact on the European landscape — with potentially significant consequences.