A score of people have died as a result of torrential rains pounding the central and southern Philippines, where tens of thousands have had to be evacuated, authorities said Friday.

Of those 20 fatalities, two died in the Western Visayas region, eight in Central Visayas, six in the Zamboanga Peninsula and four in the Autonomous Region in Muslim Mindanao, according to the National Disaster Risk Reduction and Management Council.

Earlier, that agency had said nine people had drowned.

Two other people are missing in Negros Oriental province, which is located in the Central Visayas region.

Meanwhile, more than 87,000 people have had to seek refuge in shelters due to floods triggered by heavy rainfall in the country's central and southern regions between last Friday and Wednesday.

Damage to infrastructure and harvests in Negros Occidental province, part of Western Visayas, is estimated at some 86 million pesos (some $2 million), while schools in the southern city of Zamboanga remain closed.

At least 20 people were killed last month in Zambales, a province in the northwestern Philippines, due to the torrential rains that followed Typhoon Usagi.

Deforestation, illegal mines, poor infrastructure and the construction of shanty towns magnify the effects of the torrential rains and typhoons that hit the Philippines during monsoon season.