The United Nations Refugee Agency warned Friday that a major humanitarian crisis is now underway in South Sudan, CBN News reports. At least 10,000 additional refugees crossed over the border from Sudan last week and another 50,000 are expected. More than 120,000 people in total have fled ongoing attacks by Sudan as it heads toward war with South Sudan, arriving at refugee camps in desperate need of food, shelter and water after walking for days in the heat. In the midst of the suffering, however, churches are gathering every Sunday morning in the refugee camps, often with only a tree to shelter them. Local pastors are working together to try to meet physical and spiritual needs of the thousands of refugees. "We need praying for faith in Sudan, and we need praying also for our communities," one pastor said. "With so many people, they are backsliding now because the situation is not good."