anything else. >> according to the u.n., more than 3.1 million people have now fled ukraine to other countries. the vast majority of refugees have crossed into poland. in a matter of just a few weeks, it's become one of the largest refugee-hosting countries in the world. and it is creating chaos as more displaced pour across every day. cnn's ed lavandera has more. >> reporter: when ukrainian refugees step off the train in poland, there is a sense of relief. they've escaped the war zone, but now these families must navigate a whole new world. some are lucky. they have family or friends waiting for them. but for most others, this tunnel leads them to the main strain station hall where they start making sense of the overwhelming confusion on their own. they have no plan. it's improvised from here.