The typhoon, which tore in off the Pacific Ocean on Monday afternoon, caused widespread flooding across central islands and also dumped heavy rain on the sprawling capital of Manila.
The worst appeared to be over today with the typhoon drifting into the South China Sea. But farming and fishing communities on Mindoro island south of Manila were still enduring heavy flooding.
Floodwaters rose sharply across parts of Mindoro last night, forcing residents to climb onto the roofs of their homes, according to Alfonso Umali, governor of Oriental Mindoro province on the eastern half of the island which has a total population of 1.2 million.
Coast guard personnel on speed boats hauled 21 people, including 14 children and a three-month-old baby, from rooftops in Calapan, the capital of Oriental Mindoro, last night.
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"They were drenched from the rain and crying for help. The rescue was difficult because of the strong currents," according to a coast guard report, which said rescue work was continuing today.
Intense rain in Manila last night submerged some roads and caused traffic chaos, although flooding in the megacity of 12 million had subsided today morning.
The national disaster council also reported one more death due to drowning on Samar, an impoverished island of 1.5 million people in the eastern Philippines where Melor first made landfall.
Five people have now been confirmed killed on Samar.
Millions of people were also without power in the eastern Philippines and the central islands, with no guarantees electricity would be restored before Christmas.
And 226,000 people remained in storm shelters, the national disaster council said.