DANGER-level heat indices are forecast to be experienced in 44 areas on Wednesday, according to the weather bureau.
Nonetheless, generally fair weather will continue to prevail across the country due to the easterlies.
The easterlies could also cause isolated rain showers or thunderstorms, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said.
It added that severe thunderstorms could result in flash floods or landslides.
The heat index could peak at 46 degrees in Virac (Synop), Catanduanes; Roxas City, Capiz; Butuan City, Agusan del Norte.
The following areas that are expected to experience high heat indices.
NAIA, Pasay City
Science Garden, Quezon City, Metro Manila
Laoag City, Ilocos Norte
Dagupan City, Pangasinan
Aparri, Cagayan
Sangley Point, Cavite
Ambulong, Tanauan, Batangas
Iloilo City, Iloilo
Bacnotan, La Union
Tuguegarao City, Cagayan
ISU, Echague, Isabela
Iba, Zambales
San Jose, Occidental Mindoro
Puerto Princesa City, Palawan
Aborlan, Palawan
Cuyo, Palawan
Dumangas, Iloilo
Catarman, Northern Samar
Guiuan, Eastern Samar
Maasin, Southern Leyte
Zamboanga City, Zamboanga del Sur
MMSU, Batac, Ilocos Norte
CLSU Munoz, Nueva Ecija
Cubi Point, Subic Bay, Olongapo City
Coron, Palawan
Daet, Camarines Norte
Masbate City, Masbate
La Granja, La Carlota, Negros Occidental
Siquijor, Siquijor
Catbalogan, Samar
Dipolog, Zamboanga del Norte
Sinait, Ilocos Sur
Calayan, Cagayan
Casiguran, Aurora
Alabat, Quezon
Mulanay, Quezon
Legazpi City, Albay
Mambusao, Capiz
Tacloban City, Leyte
VSU-Baybay, Leyte
Borongan, Eastern Samar
Under danger level or 41°C to 51°C heat indices, heat cramps, and heat exhaustion are likely.
Continued exposure could also cause heat stroke.
Meanwhile, the whole archipelago will continue to experience light to moderate winds and slight to moderate seas, PAGASA said.
