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Pagasa issues red rainfall alert for Zambales, Bataan towns

The Philippine weather bureau has raised a red rainfall warning over seven municipalities in Zambales and Bataan as the southwest monsoon intensifies across the region. The alert took effect Friday morning as heavy downpours continue to affect the western Luzon provinces.

LSN Philippines · 4 September 2026

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) elevated rainfall warnings to red alert status over San Narciso, San Felipe, San Marcelino, Castillejos, San Antonio, Subic and Olongapo as of 8 a.m. Friday, September 4, citing the intensification of the southwest monsoon, locally known as the habagat.

Red rainfall warnings indicate that heavy to intense rains are expected to persist in the affected areas, raising risks of flooding, landslides and other weather-related hazards. The alert serves as an urgent advisory for residents and local government units to take precautionary measures.

The southwest monsoon, which typically brings moisture-laden winds across the country during the summer and early autumn months, has been driving significant precipitation across western Luzon in recent days. Weather forecasters continue to monitor atmospheric conditions as the system affects the region.

Residents in the affected Zambales and Bataan municipalities have been advised to remain vigilant and prepared for potential flooding and related emergencies. Local disaster management agencies are on alert to respond to any incidents caused by the heavy rainfall.