PAGASA warns of danger level heat index in 22 areas on May 28, 2025

The Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) expects the heat index to reach dangerous levels in 22 areas across the country on Wednesday, May 28, 2025.

According to the state weather bureau’s advisory on May 27, these areas are forecast to experience heat indices ranging from 42°C to 45°C, significantly increasing the risk of heat-related illnesses such as heat cramps, exhaustion, and even heat stroke with prolonged exposure.

Areas with highest projected heat index:

45°C

• Butuan City, Agusan del Norte

44°C

• Laoag City, Ilocos Norte
• Dagupan City, Pangasinan
• Masbate City, Masbate
• Basco, Batanes

43°C

• MMSU, Batac, Ilocos Norte
• Bacnotan, La Union
• CBSUA-Pili, Camarines Sur
• Catarman, Northern Samar
• Dipolog, Zamboanga del Norte

42°C

• NAIA, Pasay City (Metro Manila)
• Sinait, Ilocos Sur
• NVSU, Bayombong, Nueva Vizcaya
• ISU, Echague, Isabela
• Baler, Aurora
• Iba, Zambales
• Daet, Camarines Norte
• Legazpi City, Albay
• Virac, Catanduanes
• Juban, Sorsogon
• Zamboanga City, Zamboanga del Sur
• Hinatuan, Surigao del Sur

The heat index, often referred to as the "apparent temperature," represents how hot conditions feel to the human body by factoring in both air temperature and relative humidity.

PAGASA classifies temperatures between 42 degrees Celsius and 51 degrees Celsius as the "danger" level, where heat cramps and exhaustion are likely, and heat stroke is possible with continued exposure. The weather bureau urges the public to limit outdoor activities, remain hydrated, and wear fresh clothes to avoid heat-related illnesses. — VDV, GMA Integrated News