What is the immigration crisis?

Immigration crisis refers to leaving one's hometown due to various emergencies. For example, more than 340,000 refugees have illegally immigrated to Europe this year, setting a new record for illegal immigrants in Europe. Europe is now facing the worst immigration crisis since World War II. Most of these refugees come from Middle East and African countries, mainly Syria, Iraq and Afghanistan. Because of the political turmoil, broken families and destroyed homes, they entered Europe to seek safety and shelter, which triggered a wave of refugees in Europe.