The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said in a forecast that thirty areas across the country could reach a “danger level” heat index on Friday,

Based on the state weather bureau’s 5 p.m. May 22 bulletin, the synoptic stations in the following areas could reach a 42°C-46°C heat index on Friday:

46°C

Aparri, Cagayan

45°C

Dagupan, Pangasinan

44°C

Laoag, Ilocos Norte

Tuguegarao City, Cagayan

Subic Bay, Olongapo

43°C

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Batac, Ilocos Norte

Cacnotan, La Union

Echague, Isabela

Baler, Aurora

Casiguran, Aurora

Camiling, Tarlac

Sangley Pt., Cavite City

Tanauan, Batangas

Infanta, Quezon

Alabat, Quezon

Daet, Camarines Norte

Masbate City

Catarman, Northern Samar

42°C

NAIA, Pasay City

Sinait, Ilocos Sur

Bayombong, Nueva Vizcaya

Iba, Zambales

Los Baños, Laguna

San Jose, Occidental Mindoro

Cuyo, Palawan

Legazpi, Albay

Pili, Camarines Sur

Iloilo City

Dumangas, Iloilo

Catbalogan, Western Samar

PAGASA classifies heat indices between 42°C and 51°C under the danger category. These may cause heat cramps, heat exhaustion, and heat stroke.

The weather bureau urges the public to limit outdoor activities, remain hydrated, and wear fresh clothes to avoid heat-related illnesses.