Over 30 areas under 'danger' heat index on May 18 — PAGASA

More than 30 areas across the country are expected to experience “danger”-level heat index on Monday, May 18, the state weather bureau said.

Based on the five-day heat index forecast of the Philippine Atmospheric, Geophysical and Astronomical Services Administration, at least 35 areas may record heat index levels ranging from 42°C to 45°C.

Areas under the “danger” category are expected to register the following heat index levels:

45°C

• Coron, Palawan
• San Jose, Occidental Mindoro
• Cuyo, Palawan

44°C

• Dagupan City, Pangasinan
• Sangley Point, Cavite City, Cavite
• Roxas City, Capiz

43°C

• Laoag City, Ilocos Norte
• Baler (Radar), Aurora
• San Ildefonso, Bulacan
• Hacienda Luisita, Tarlac City
• Ambulong, Tanauan, Batangas
• Puerto Princesa City, Palawan
• Borongan, Eastern Samar
• Guiuan, Eastern Samar
• Dipolog, Zamboanga del Norte
• Zamboanga City, Zamboanga del Sur
• Butuan City, Agusan del Norte

42°C

• NAIA Pasay City, Metro Manila
• Sinait, Ilocos Sur
• Aparri, Cagayan
• Tuguegarao City, Cagayan
• Casiguran, Aurora
• Iba, Zambales
• CLSU Muñoz, Nueva Ecija
• Cubi Pt., Subic Bay, Olongapo City
• Infanta, Quezon
• Alabat, Quezon
• Mulanay, Quezon
• NAS-UPLB, Los Baños, Laguna
• CBSUA-Pili, Camarines Sur
• Iloilo City, Iloilo
• Dumangas, Iloilo
• La Granja, La Carlota, Negros Occidental
• Catarman, Northern Samar
• Catbalogan, Western Samar
• Tacloban City, Leyte
• Maasin, Southern Leyte

Meanwhile, more than 30 areas are forecast to experience “extreme caution” heat index levels ranging from 33°C to 41°C.

Only Itbayat, Batanes is expected to fall under the “caution” category with a projected heat index of 31°C.

Areas forecast to record “not hazardous” heat index levels, or below 27°C, include Baguio at 26°C, Benguet State University in La Trinidad, Benguet at 24°C, and the Benguet radar station in Tuba at 19°C.

PAGASA said the heat index refers to the temperature the human body feels when relative humidity is combined with actual air temperature. High humidity reduces the evaporation of sweat, making it more difficult for the body to cool down. —MCG, GMA News