15 areas to hit 'danger' heat index on May 5 — PAGASA

Fifteen areas are expected to experience “danger” level heat index on Tuesday, May 5, 2026, the state weather bureau, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said.

Based on its five-day heat index forecast, the following areas may record heat index levels ranging from 42°C to 44°C:

• Laoag City, Ilocos Norte – 42°C
• Dagupan City, Pangasinan – 44°C
• Bacnotan, La Union – 42°C
• Tuguegarao City, Cagayan – 42°C
• Iba, Zambales – 42°C
• Aborlan, Palawan – 43°C
• Virac (Synop), Catanduanes – 43°C
• Mambusao, Capiz – 44°C
• Iloilo City, Iloilo – 43°C
• Dumangas, Iloilo – 43°C
• VSU-Baybay, Leyte – 42°C
• Borongan, Eastern Samar – 43°C
• Surigao City, Surigao del Norte – 42°C
• Hinatuan, Surigao del Sur – 42°C
• Butuan City, Agusan del Norte – 42°C

On Monday, 20 areas nationwide reached “danger” level heat index, higher than the 13 areas initially forecast.

Meanwhile, more than 50 areas—including two in Metro Manila—are expected to experience “extreme caution” levels, or heat index values between 33°C and 41°C.

Tanay, Rizal is the only area expected to fall under the “caution” level, with a heat index of 32°C.

The following areas are also expected to record “not hazardous” heat index levels, or below 27°C, on Tuesday:

• Baguio City, Benguet – 26°C
• BSU, La Trinidad, Benguet – 26°C
• Benguet Radar, Tuba, Benguet – 21°C

The heat index reflects how hot it feels to the human body by combining air temperature and humidity. High humidity reduces the evaporation of sweat, making it harder for the body to cool down.—MCG, GMA News