Metro Manila and 35 other areas in the country are expected to experience a dangerous level of heat index on Monday, May 13, according to the state weather bureau PAGASA.
In its Tuesday advisory, PAGASA said the following areas may experience a heat index from 42°C to 47°C today:
47°C
- Aparri, Cagayan
46°C
- Dagupan City, Pangasinan
- Tuguegarao City, Cagayan
- Roxas City, Capiz
- Guiuan, Eastern Samar
45°C
- Laoag City, Ilocos Norte
- ISU Echague, Isabela
- Iloilo City, Iloilo
44°C
- Bacnotan, La Union
- San Jose, Occidental Mindoro
- Puerto Princesa City, Palawan
- Cuyo, Palawan
- Dumangas, Iloilo
43°C
- NAIA, Pasay City
- MMSU, Batac, Ilocos Norte
- Baler (Radar), Aurora
- Aborlan, Palawan
- Virac (Synop), Catanduanes
- Catarman, Northern Samar
- Catbalogan, Western Samar
- Butuan City, Agusan del Norte
42°C
- Science Garden, Quezon City
- Sinait, Ilocos Sur
- NVSU Bayombong, Nueva Vizcaya
- Iba, Zambales
- Casiguran, Aurora
- Cubi Pt., Subic Bay, Olongapo City
- Ambulong, Tanauan, Batangas
- Daet, Camarines Norte
- Masbate City, Masbate
- CBSUA-Pili, Camarines Sur
- Siquijor, Siquijor
- Tacloban City, Leyte
- Borongan, Eastern Samar
- Dipolog, Zamboanga del Norte
- Zamboanga City, Zamboanga del Sur
PAGASA on May 12 reported that Aparri, Cagayan registered a heat index of 49°C, while Roxas City in Capiz at 47°C.
The heat index is the human discomfort index that gives the "apparent" temperature, or what humans perceive or feel as the temperature affecting their body.
The effect-based danger classification ranges from 42°C to 51°C, and its effects on the body are that heat cramps and exhaustion are likely, and heat stroke is probable with continued exposure.
Symptoms of heat-related illnesses include sweating heavily, exhaustion or fatigue, dizziness, blacking out, weak but fast pulse, nausea, and vomiting.
