MANILA, April 20 -- The weather bureau warned of dangerous heat index levels in 19 areas across the country on Saturday.

Based on the Philippine Atmospheric, Geophysical and Astronomical Services Administration's (PAGASA) 5 p.m. forecast on Friday, the following areas may have a heat index ranging from 42 degree C to 44 degree C on Saturday:

Dagupan City, Pangasinan - 44 degree C Bacnotan, La Union - 42 degree C Aparri, Cagayan - 42 degree C Tuguegarao, Cagayan - 42 degree C Clark Airport (DMIA), Pampanga - 42 degree C Ambulong, Tanauan, Batangas - 42 degree C Coron, Palawan - 42 degree C Puerto Princesa City, Palawan - 42 degree C Aborlan, Palawan - 44 degree C Virac (SYNOP), Catanduanes 42 degree C CBSUA-Pili, Camarines Sur - 43 degre...