Turkey has warned the European Union that 3 million more refugees could flee fighting in Syria as the EU struggles to manage its biggest migration emergency in decades. Around 2 million refugees from Syria are currently in Turkey, and tens of thousands of others have entered the EU via Greece this year, overwhelming coast guards and reception facilities. Austrian Chancellor Werner Faymann is heading to the eastern Aegean island of Lesbos with Greece's prime minister to view first-hand the impact of the refugee crisis and tour the facilities set up to handle the new arrivals, which number in the hundreds and sometimes thousands every day.