MANILA, Philippines — The rainfall warning in Metro Manila has been downgraded to yellow while Zambales and Bataan remain under an orange alert as monsoon rains continue to drench a wide swathe of Luzon, according to the Philippine Atmospheric, Geophysical, and Astronomical Services Administration).In its 5 p.m. bulletin, the towns of Bagac, Mariveles, Morong, Limay, Orion, Pilar and Balanga in Bataan and San Antonio, Subic and Olongapo City in …