Shortages of food and water after Nepal's deadly earthquake have prompted concerns that disease could spread among survivors, health officials warned in an appeal for urgent assistance Monday. "Supplies are running out," one told NBC News. Though he said it's not at the "panic stage yet," he warned that it may be soon as locals in Kathmandu continue to share resources. Saturday's magnitude-7.8 earthquake left more than 4,00 people dead and thousands more injured. Officials have warned that the death toll could jump once rescuers reach isolated rural communities. Nepal's top bureaucrat urged foreign countries to give special relief materials and medical teams. "We are really desperate for more foreign expertise to pull through this crisis," he told Reuters while also asking for tents, dry goods, blankets, mattresses and medicines.