Manila, April 25 -- The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) warned of dangerous heat index levels in 38 areas across the country on Thursday.

Based on the weather bureau's 5 p.m. forecast on Wednesday, the following areas may have a heat index ranging from 42C to 47C on Thursday:

NAIA Pasay City, Metro Manila - 45C Science Garden, Quezon City, Metro Manila - 43C Laoag City, Ilocos Norte - 42C Dagupan City, Pangasinan - 46C Bacnotan, La Union - 43C Aparri, Cagayan - 43C Tuguegarao, Cagayan - 44C ISU, Echague, Isabela - 43C Iba, Zambales - 43C Clark Airport, Pampanga - 43C CLSU Munoz, Nueva Ecija - 44C Baler (Radar), Aurora - 43C Casiguran, Aurora - 42C Cubi Pt. Subic Bay Olongapo City - 4...