Hopes of finding more survivors in the mud are fading
The Red Cross has put the death toll from Thursday's tragedy at 406, with 398 missing, but the aid organisation said the toll could pass 1,000.
Hopes of finding many more survivors are fading.
The mudslides, triggered by the heavy rains of Typhoon Durian, struck near the Mayon volcano south-east of Manila.
Mrs Arroyo released 1bn pesos ($20m, £10m) for reconstruction work and vowed further efforts to find survivors.
"All resources of the government will continue to be mobilised without let-up as we pin hope against hope on the search of survivors," she said in a statement.
Thick sludge
The relief effort is progressing slowly, with soldiers having to walk for hours to reach affected areas.
Whole villages were engulfed by mud that poured from the slopes of the volcano, some 350km (220 miles) from Manila.
Dark mud surrounds villages and covers the usually green hills
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The head of the local Red Cross, Richard Gordon, said the number of victims could well rise.
"There are many unidentified bodies. There could be a lot more hidden below. Whole families may have been wiped out," he told the Associated Press news agency.
The BBC's Sarah Toms, in the Philippines, says people have been using their bare hands to pull bodies from the thick sludge.
About 100 miners have arrived to help with rescue efforts and army commanders have asked for dog teams to help with the search.
The first funerals were carried out late on Saturday, as bodies decomposed in the heat.
Some victims were buried in a mass grave as a precaution against the spread of disease.
"We opted to do this because we might have an epidemic, which could be expected because of the high number of evacuees and homeless," local official Gene Villareal told AP.
Foreign help
Many of the survivors, who have lost not only their homes but their livelihoods after fruit trees and rice paddies were destroyed, have crammed into makeshift shelters in schools and churches.
Disaster agencies say there is an urgent need for fresh water, food and medicine for the survivors, and more body bags.
Canada has pledged more than US$800,000 to help the relief effort and Japan says it will give more than $170,000.
Durian - named after a spiky Asian fruit - was the fourth typhoon to hit the Philippines in the last three months.
Philippine president Gloria Macapagal-Arroyo declared a state of national calamity Sunday in the wake of Typhoon Durian, allowing the government to more rapidly release funds needed to bolster search and rescue efforts. Relief efforts in the Philippines faced delays Sunday for survivors, as fears grew of a rising death toll in the archipelago nation from last week's storm.

Red Cross officials recorded a death toll of at least 406, with 398 others missing and another 489 as injured, based on figures provided by mayors of devastated towns in the eastern Philippines, where Durian hit with 139 mph winds and torrential rains on Thursday.

Canada pledged $870,000 and the Netherlands Red Cross pledged $53,000 to help the country deal with the aftermath of the storm that triggered massive flooding and volcanic mudslides. The United States also promised an undetermined amount of aid. 

Many provinces lost power, making communication virtually impossible. In one of the worst hit provinces, Albay, two villages were buried by volcanic mudslides and volunteers were working to recover bodies from the wreckage.

According to the Red Cross, rescue boats were used to survey the damage and take people to the 305 evacuation centers. The Red Cross estimated about 66,616 people were now homeless based upon the number of homes destroyed in the wake of Durian.

Earlier, the National Disaster Coordinating Council said 38,473 displaced people were in evacuation shelters.

===Often hit by storms===
The Philippines' location in the northwestern Pacific puts it right in the pathway of the world's top typhoon generator, according to meteorologists. Durian is the fourth devastating typhoon to strike the Philippines in the past four months, covering the Mayon volcano with so much wind and rain that ash and boulders cascaded down its slopes in walls of black mud that swamped entire villages Thursday.

Hemmed in by geography and poverty, the Philippines has tried to minimize the damage caused by the 20 or so typhoons that hit the sprawling archipelago every year. Nationwide in 2001-05, 2,892 people were killed and 909 others went missing in typhoons and other storms, which caused damage totaling US$521 million, says the National Disaster Coordinating Council.

Anthony Golez, the council's deputy chief, notes that the estimate doesn't include losses to employment and other economic opportunities, and that Filipinos should be "bombarded" with disaster information, including stories of the Indian Ocean tsunami two years ago and the February 2006 landslide in the central Philippine village of Guinsaugon that killed more than 1,000.

Senator Richard Gordon, who heads the Philippine National Red Cross, said better planning is needed. "The big problem here in our country is we don't plan our communities. It's every man for himself."