The Philippine Atmospheric, Geophysical, and Astronomical Services Administration has issued a flood advisory for the Pasig-Marikina-Tullahan Rivers Wednesday, warning communities near mountain slopes or low-lying areas in Rizal and Metro Manila to stay vigilant for possible landslides or flooding.
PAGASA issued the first flood advisory for these rivers around 3 p.m. due to the anticipated heavy rains during the passage of typhoon “Ulysses.”
Main watercourses that are likely to be affected are the Upper Marikina River and its surrounding areas Rodriguez, Antipolo City, San Mateo, Quezon City, Marikina City, and Pasig City; Lower Marikina River and nearby areas Pasig and Mandaluyong City; Pasig River and surrounding areas Pasig, Makati City, Mandaluyong, and Manila; and Tullahan River and low-lying areas, Quezon City, Caloocan City, Malabon City, Navotas City, and Valenzuela City.
Other tributaries that may be affected by rising water level are Mango River and nearby Rodriguez; Nangka River and nearby Marikina, San Mateo, and Antipolo; and San Juan River and low-lying communities in Quezon City, San Juan City, and Manila.
PAGASA advised those living near mountain slopes and in low-lying areas of the abovementioned cities and local disaster risk reduction and management councils concerned to remain alert for possible flash floods and landslides.
The State weather bureau said that local flooding is possible in some areas due to poor drainage system and impounding water.