MANILA: At least 30 areas are forecast to experience danger level heat index, while the country will continue to experience fair weather with isolated rain showers, the weather bureau said Monday.The highest heat index could peak at 47 degrees in Dagupan City, Pangasinan and Aparri, Cagayan.Heat indices or what the temperature feels like to the human body when relative humidity is combined with the air, ranging from 42 to 45 degrees are forecast in these areas:NAIASinait, Ilocos SurLaoag, Ilocos NorteMMSU Batac, Ilocos NorteBacnotan, La UnionTuguegarao City, CagayanISU Echague, IsabelaBaler, AuroraCasiguran, AuroraCubi Point, Subic Bay, Olongapo CitySangley Point, CaviteAmbulong, Tanauan BatangasSan Jose, Occidental MindoroPuerto Princesa, PalawanCuyo, PalawanDaet, Camarines NorteVirac, CatanduanesMasbate CityCBSUA-Pili Camarines SurRoxas City, CapizIloilo CityDumangas, IloiloCatarman, Northern SamarCatbalogan, SamarTacloban, LeyteBorongan, Estern SamarG uiuan, Eastern SamarDipolog, Zamboanga del NorteEarlier, the weather bureau's chief Nathaniel Servando said places that are flat, near coastal areas, and surrounded by mountains or valleys, will consistently have high heat indices likely until the second half of May.The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said under danger level or 41°C to 51°C heat indices, heat cramps and heat exhaustion are likely.Continued exposure to the sun could also cause heat stroke.Meanwhile, fair weather will prevail across the archipelago on Monday, with isolated rain showers due to the easterlies and localized thunderstorms.Light to moderate winds and slight to moderate seas will also continue to prevail across the country, PAGASA said.Source: Philippines News Agency