Heat index in 30 areas may reach 'danger' level on May 3

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) warned that 30 areas may face a “dangerous” heat index between 42 degrees Celsius (℃) and 47℃ on Friday, May 3.
The heat index measures how hot it feels when relative humidity is combined with the actual air temperature.
PAGASA said Dagupan City, Pangasinan and Aparri, Cagayan may experience a heat index of 47℃ on Friday afternoon.
The heat index can reach 45℃ in Roxas City, Capiz, and 44℃ in Laoag City, Ilocos Norte; Iba, Zambales; Cuyo, Palawan; Virac, Catanduanes; Pili, Camarines Sur; Dumangas, Iloilo; and Zamboanga City, Zamboanga del Sur.
Meanwhile, Bacnotan, La Union; Tuguegarao City, Cagayan; Casiguran, Aurora; San Jose, Occidental Mindoro; Puerto Princesa City, Palawan; and Aborlan, Palawan may have a heat index of 43℃.
It may reach 42℃ in Batac, Ilocos Norte; Baler, Aurora; Cubi Pt. Subic Bay, Olongapo City; Infanta, Quezon; Coron, Palawan; Daet, Camarines Norte; Legazpi City, Albay; Masbate City, Masbate; Mambusao, Capiz; Iloilo City, Iloilo; La Granja, La Carlota, Negros Occidental; Catarman, Northern Samar; Catbalogan, Samar; and Cotabato City, Maguindanao.
PAGASA said heat indices ranging from 42°C to 51°C indicate “danger,” as "heat cramps and heat exhaustion are likely," and "heat stroke is probable with continued activity."
Meanwhile, a heat index above 52°C indicates “extreme danger” as “heat stroke is imminent.”