At least 2.5 million Syrians are believed to have fled their homes because of civil war, aid groups said on Tuesday, November 13 more than double previous estimates, Reuters reported. Only 5 percent of the 2.5 million are believed to be living in public facilities, including warehouses and schools, said Melissa Fleming, chief spokeswoman of the U.N. High Commissioner for Refugees (UNHCR). The rest are staying with host families, making it more difficult to count them. In recent days, air strikes on the town of Ras al-Ain near the Turkish border have caused some of the biggest refugee movements of the conflict. The United Nations said on Friday that up to 4 million people inside Syria will need humanitarian aid by early next year when the country is in the grip of winter.