The United Nations was ready to help the Philippines, a spokesman for U.N. Secretary-General Antonio Guterres said in a statement.
Last week, 46 people were killed in the central Philippines when a typhoon hit. In 2013, super typhoon Haiyan killed nearly 8,000 people and left 200,000 families homeless.
The south of the Philippines has been plagued by insurgencies by communist rebels and Muslim separatists for years, as wel as often bearing the brunt of tropical storms roaring in from the Pacific.
The region was hit by another disaster on the weekend when fire swept through a shopping mall in the city of Davao, killing at least 37 people, most of them workers at a call centre, city government officials said.
The vice mayor of the southern city of Davao, Paolo Duterte, said the chance of survival for any of the 37 people missing at the NCC Mall was "zero".
The fire broke out on Saturday at a furniture shop on the mall's third level and quickly engulfed an outsourcing business on the top floor, said a spokeswoman for the city government, Ma. Teresita Gaspan.
The cause was not known but an investigation was being launched as authorities searched for the bodies of the victims.
President Duterte and his daughter, Sara Duterte, who is mayor of the city, visited the scene late on Saturday to meet anxious relatives of the missing and survivors.
