Typhoon Haiyan "affected" a total of 9.5 million people across the Philippines -- and displaced at least 600,000 -- when it slammed into the country on Friday, according to the UN's Office for the Coordination of Humanitarian Affairs.
Survivors were described as being in desperate need of clean drinking water and food on Monday.
"In some cases the devastation has been total," Secretary to the Cabinet Rene Almendras told a news conference.
Haiyan is estimated to have destroyed about 70 to 80 percent of structures in its path as it tore into the coastal provinces of Leyte and Samar.
NBCNews.com has prepared a list of organizations
that are assisting in the relief efforts.