Isang

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said. As of 4 p.m., the center of Isang was located in the vicinity of Aglipay, Quirino, packing maximum sustained winds of 55 kilometers per hour near the center and gusts of up to 90 kph. It was moving west-northwest at 15 kph.

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Signal No. 1 remained raised over Cagayan, Isabela, Quirino, Nueva Vizcaya, Apayao, Kalinga, Abra, Mountain Province, Ifugao, Benguet, Ilocos Norte, Ilocos Sur, La Union, Pangasinan, Aurora and the northern part of Nueva Ecija.

Isang and the enhanced southwest monsoon will bring heavy rains over Zambales and Bataan, with 100 to 200 millimeters of rainfall expected until this afternoon.

Blame for MM floods

In an interview with "Storycon" on One News, Public Works Secretary Manuel Bonoan said some pumping stations in Manila "were not able to cope with floodwaters" as outlets were also submerged. He said the drainage system in Metro Manila is 70 percent silted.

He also noted that it was high tide when it rained Friday morning and that some drainage systems were blocked by trash even after recent clean-up operations.

He said the DPWH is trying to assist LGUs and the Metropolitan Manila Development Authority in flood management, but maintained that engineering interventions are just part of the solution.

"It has to be done holistically and in an integrated manner. Like what we say in Metro Manila, we have our engineering interventions, but I think we have to address solid waste management, we have to address land use, resettlement of informal settlers, the drainage system," Bonoan said.