MANILA, Philippines - Public storm warning signal number 2 has been raised over Cagayan and Isabela provinces amid the threat of heavy rains and strong winds being brought by tropical storm "Helen," PAGASA said Monday night.
In its 11 p.m. advisory, the state weather bureau said the 2 provinces should expect winds of 61-100 kilometers per hour in at least 24 hours.
The storm could result in moderate damage to farms, trees, and houses in Isabela and Cagayan, PAGASA warned.
Public storm warning signal number 1 has also been hoisted over Abra, Aurora, Quirino, Ilocos Norte, Nueva Vizcaya, Ifugao, Mountain Province, Kalinga, Apayao, the Babuyan and Calayan group of islands, and the Batanes group of islands.
Areas under signal number 1 will experience winds of 30-60 kph within the next 36 hours, PAGASA said.
"Residents living in low lying and mountainous areas under public storm warning signal #2 and #1 are alerted against possible flashfloods and landslides," the weather bureau said. "Likewise, those living in coastal areas under public storm warning #2 are alerted against big waves or storm surges generated by this tropical cyclone."
PAGASA said tropical storm "Helen" (international name Kai-tak) is expected to enhance the southwest monsoon (habagat) that will bring rains over Luzon and Visayas, especially over the regions' western sections.
The storm is bringing estimated rainfall of between 15 – 35 mm per hour (heavy to torrential) within its 400 km diameter.
Light to moderate rains now affecting central and southern Luzon will become moderate to heavy rains over Camarines provinces, Quezon province, Rizal, Bulacan, Pampanga, Laguna, Cavite, Batangas, Mindoro, Bataan, Zambales and Metro Manila, PAGASA said.
It advised fishing boats and other small seacraft not to venture out into the seaboards of central and southern Luzon and the Visayas because of the tropical storm and the southwest monsoon.
As of 10 p.m. Monday, the center of tropical storm "Helen" was estimated to be at 350 km east of Casiguran, Aurora.
The storm, which is packing maximum sustained winds of 65 kph near the center and gustiness of up to 80 kph, is moving west at 15 kph.
The storm is expected to be 120 km east of Tuguegarao City by Tuesday night and at 160 km north of Laoag City by Wednesday night.
It is expected to be at 430 km west northwest of Basco, Batanes by Thursday night.
"The public and the disaster coordinating councils concerned are advised to take appropriate actions and watch for the next bulletin to be issued at 5 a.m. tomorrow," PAGASA said.
Authorities warned that the brewing storm could bring more misery to the flood-battered capital and surrounding areas, where nearly half a million were in evacuation centres.
While flooding that covered 80 percent of Manila last week had largely subsided, vast areas of mainly rice-growing provinces to the north were still under water that in some places remained neck-deep.
Most of the 411,000 people crammed into gymnasiums, schools and other government evacuation centres were in the flooded farming provinces, with many others struggling by living in partly submerged homes.
"These are the people we are most worried about," civil defense chief Benito Ramos told AFP.
"We have not yet fully recovered and here comes another storm."
Two weeks of relentless monsoon rains peaked early last week with about two days of torrential rain across the main island of Luzon, claiming at least 92 lives and affecting more than 3.4 million people, according to the government.
Manila, a megacity of about 15 million people, endured its worst flooding since 2009, while farmers to the north said they had not experienced waters reaching such levels for decades.
The farming regions are a natural catch basin, with rivers streaming down from mountains to the north eventually ending in Manila Bay.
But many of the dams in the mountains were already close to overflowing before last week's deluge, while the natural drainage areas near the bay have been getting increasingly clogged with millions of people living around them.
With the waters not yet receding, Tropical Storm Helen is expected to start dumping up to 3.5 centimeters (1.3 inches) of rain an hour in the evening, the state weather bureau said.
Government forecasters said the storm was expected to add to seasonal monsoon rains for the next two to three days.
While not being as directly impacted, Manila was also expected to suffer more heavy downpours, they said.
"The ground is already wet and saturated, and we could have landslides and flash floods," Science and Technology Secretary Mario Montejo, who oversees the weather bureau, told reporters.
On the outskirts of Manila, flood survivors were still struggling to clean up their homes and even just to get food, after losing most of their belongings last week.
"I hope to God this new storm doesn't happen," said 64-year-old grandmother Fe Bermejo as she queued alongside hundreds of other people for Red Cross relief goods in Valenzuela, one of the hardest hit coastal districts.
In the neighbouring district of Malabon, people were trickling back to clean up their mud-streaked homes amid warnings to be prepared for fresh evacuations.
"Many have returned to their homes to rebuild, but sadly they may have to leave again if there are more floods because of this new storm," said Roderick Tongol, head of Malabon's disaster response unit.
"We are on heightened alert, and we have placed all our rescue teams on standby."
The National Disaster Risk Reduction and Management Council said that, of the more than 3.4 million people affected by the floods, one million were forced to flee their homes with 92 people killed by the rains.
The government has admitted to being overwhelmed by the scale of the relief effort, with access to toilets at evacuation centers and getting relief goods to the homeless proving a major problem.
The Philippines is hammered by an average of 20 storms a year, many of them deadly.
But Environment Minister Raman Paje said much more intense rains, such as those experienced last week, should be considered the "new normal" as part of climate change. - with a report from Agence France-Presse