Manila - Six people were killed Thursday in two separate landslides in the northern Philippines as a weakened storm continued to bring heavy rains to the area, a police report said.

Two more people were missing in the landslides in Benguet province, 240 kilometres north of Manila, according to the report.

The landslides brought to 29 the death toll caused by typhoon Parma, which has weakened to a tropical depression after making landfall three times in the northern Philippines.

Floods have submerged dozens of towns in the northern Philippines, where Parma has hovered for nearly one week.

Relief officials said five swollen dams in the area released water that flooded towns in the provinces of Pangasinan, Nueva Ecija, Tarlac, Zambales, Pampanga and Bulacan.

Tens of thousands of people have been advised to move to higher ground to avoid being caught in rampaging floodwater.

The weather bureau said Parma, packing maximum sustained winds of 55 kilometres per hour (kph), was to stay in the northern Philippines for at least three more days.

Parma first pummelled the northern Philippines on October 3, killing at least 23 people and displacing more than 100,000.

With maximum sustained winds of up to 195 kph and gusts of up to 235 kph, Parma uprooted trees, toppled electric posts and tore roofs off houses.

A week before Parma hit the northern Philippines, storm Ketsana battered Manila and outlying areas, causing the worst floods in over 40 years.

Nearly 300 people were killed and more than 4 million people were affected by the floods and Ketsana.

Almost two weeks after the deluge, more than 316,000 people remained in evacuation centres in Manila and the affected areas, where dozens of villages remained flooded. (dpa)