The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) has issued a weather advisory as Tropical Cyclone “ISANG” continues to intensify and enhance the Southwest Monsoon. As of the 11:00 AM bulletin on August 22, 2025, PAGASA warns of heavy to intense rainfall across several parts of Luzon today until noon of Saturday, August 23.
The following areas may receive 100 to 200 mm of rain:
La Union, Pangasinan, Benguet, Quirino, Nueva Vizcaya, Aurora, Zambales, Bataan
Meanwhile, moderate to heavy rains (50 to 100 mm) are expected in:
Metro Manila, Cagayan, Isabela, Nueva Ecija, Tarlac, Pampanga, Bulacan, Rizal, Laguna, Quezon, Camarines Norte, Camarines Sur, Ifugao
Some streets in Metro Manila have already experienced flooding earlier today, including parts of:
España Boulevard (Manila), Rodriguez Sr. Avenue (Quezon City), Taft Avenue (Pasay)
From noon of August 23 to noon of Sunday, August 24, light to moderate rains (50–100 mm) will continue in:
Pangasinan, Zambales, Bataan
PAGASA reminded the public that rainfall amounts may be higher in mountainous or hilly areas, increasing the risk of landslides and flash floods, especially in places that have recently received heavy rain.
Aside from Cyclone “ISANG,” the Southwest Monsoon is also bringing rains to Southern Luzon and nearby islands. From today until noon of August 23, heavy to intense rains (100–200 mm) are expected in:
Occidental Mindoro
Moderate to heavy rains (50–100 mm) are also likely in:
Cavite, Batangas, Marinduque, Romblon, Oriental Mindoro, Palawan
From tomorrow noon until Sunday noon (August 24), the monsoon will continue to bring 50–100 mm of rain to:
Palawan, Occidental Mindoro
PAGASA urges residents, especially those in low-lying or mountainous areas, to take precautions and listen to local disaster risk reduction offices. Local PAGASA stations may release more specific updates, such as Heavy Rainfall Warnings or Thunderstorm Advisories, which are based on real-time data and radar technology and are more useful for immediate decision-making.
The public is also reminded not to use general Weather Advisories as a basis for suspending classes or work. These are broader in scope and less accurate for short-term planning. The next official PAGASA weather advisory is expected by 5:00 PM today unless significant changes occur. — Cali Demi
