‘Danger level’ heat index in 19 areas on Monday, April 21, 2025 —PAGASA

A “danger level” heat index is forecast to be measured in 19 areas in the country on Monday, PAGASA said.

According to the state weather bureau’s 5 p.m. April 20 bulletin, the synoptic stations in Dagupan City, Pangasinan and Aparri, Cagayan will measure a 44°C heat index.

Meanwhile, a 43°C heat index is forecast to be measured by the weather stations in the following places:

• Tuguegarao City, Cagayan
• ISU Echague, Isabela
• Cubi Pt., Subic Bay, Olongapo City
• San Ildefonso, Bulacan
• Sangley Point, Cavite City

PAGASA also said the weather stations in the following areas will measure a 42°C heat index:

• NAIA Pasay City
• Bacnotan, La Union
• Casiguran, Aurora
• Ambulong, Tanauan Batangas
• San Jose, Occidental Mindoro
• Puerto Princesa City, Palawan
• Daet, Camarines Norte
• Masbate City
• CBSUA-Pili, Camarines Sur
• Dumangas, Iloilo
• Catarman, Northern Samar
• Zamboanga City, Zobonga del Sur

The heat index measures how hot it feels to the human body, factoring in humidity along with the actual air temperature.

The state weather bureau categorizes areas with a 42°C to 51°C heat index in the "danger" category, with a risk for heat stroke.

The Office of Civil Defense has activated its emergency response protocols in some areas in the country as the dangerous heat index poses health risks.

This move mandates all OCD regional offices to be on alert and working closely with local authorities to provide immediate assistance and ensure public safety. — Mariel Celine Serquiña/BM, GMA Integrated News