Manila, Aug. 1 -- The southwest monsoon or "habagat" affecting Luzon and the Visayas will cause rains across these islands, the weather bureau said on Friday.

Scattered rains and thunderstorms will prevail over the Ilocos Region, Batanes, the Babuyan Islands, Abra, Benguet, and Zambales.

Moderate to heavy rains in these areas could result in flash floods or landslides, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said in its 4 a.m. weather bulletin.

The Visayas and the rest of Luzon will experience isolated rainshowers or thunderstorms.

Mindanao will likewise experience isolated rain showers caused by localized thuderstorms.

Meanwhile, moderate to strong winds and moderate to rough se...