MANILA (Updated) -- Tropical Depression "Maring" dumped heavy rain in several areas in Luzon on Tuesday, September 12, flooding Metro Manila and nearby provinces and causing landslides and flash floods that killed at least four people.
Six others were missing, including five residents of Laguna province, where floods swept away a house next to a swollen river, disaster relief officials said. The other missing person was reported in nearby Cavite province, where several areas were submerged.
Financial markets, government offices and schools were closed and at least 21 flights were canceled or diverted.
The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said Tropical Depression Maring made landfall in Mauban, Quezon, on Tuesday morning and was moving northwest with winds of 60 kilometers per hour (kph) and gusts of up to 100 kph.
Pagasa warned that continued moderate to heavy rain in Manila and nearby provinces along the storm's path could trigger more floods and landslides.
Disaster response official Elmer Espiritu said two minors identified as Jude Pundal, 17, and his younger brother Justil, 14, died when a landslide covered their house at the foot of a hill around 4 a.m. Tuesday in Barangay Dolores, Taytay.
READ: 2 teens killed in Taytay landslide
The brothers were declared dead on arrival at the hospital, while their mother, Judith, sustained injuries due to the incident.
Espiritu said the landslide was triggered by heavy rainfall.
Officials ordered mandatory evacuations in risky areas after some residents refused to leave, he added.
In Quezon province, a two-month-old girl was killed and seven others were injured when a concrete wall around a hospital collapsed on three houses in Lucena City after heavy rain soaked the soil at the wall's base, officials said.
Police also reported that a 12-year-old girl drowned in Pasay City while bathing in a river during the heavy downpour.
Twenty-two passengers on a bus stranded in floodwaters were rescued in Quezon, officials said.
In Calamba, Laguna, flash floods swept away at least one house along the bank of the swollen San Cristobal River. Five people are missing, while eight others, including five children, were rescued, said disaster response official Noriel Habana.
"They were informal settlers, living beside a river. There was a flash flood and it washed out their two storey-house," he said.
"In previous floodings, we had pre-emptive evacuation. It just so happened it was a flash flood and they had no time to react," Habana added.
Tropical Depression Maring was the latest to hit the country, which endures about 20 such storms each year.
Weather forecaster Renito Paciente said Maring was moving at just 15 kph, worsening the flooding.
"Because it moves slowly, it can bring more rain over an area," Paciente said.
A stronger storm, Typhoon Lannie (Talim), was located 865 kilometers east of the Philippines' northern tip and was moving toward Taiwan and eastern China.
Lannie was due to make landfall on Taiwan late Wednesday and officials there were especially concerned about mudslides in mountainous parts of the island. Taiwan's government was contacting the heads of mountain villages, arranging free evacuations to shelters, and monitoring rivers and mudslide-prone areas.
Lannie was expected to hit China's southeastern coast either Thursday or Friday, China's official Xinhua News Agency reported. Coastal Zhejiang province ordered local governments and emergency services to prepare for the storm and possible flooding, China National Radio said. (Third Anne Peralta-Malonzo/AP/AFP/SunStar Philippines)