Ukrainian citizens and residents started to leave the country to seek safety when Russian troops increased the threat of an imminent armed attack on the country, which sadly materialised on 24 February prompting thousands of them to flee in a hurry towards neighbouring countries, notably Hungary, Poland, Romania, Slovakia and Lithuania. You will find resources to find help if you find yourself in the situation of escaping the war in Ukraine on the website of Eurodesk.
Source: Eurodesk