‘Danger level’ heat index seen in 15 areas on Thursday, May 29, 2025

A “danger level” heat index will hit 15 areas across the country on Thursday, May 29, PAGASA said in its daily forecast.

Based on the state weather bureau’s 5 p.m. May 28 bulletin, the synoptic stations in the following areas will measure a 42°C-44°C heat index:

44°C

Masbate City

Aparri, Cagayan

Tuguegarao City, Cagayan

ISU Echague, Isabela

TAU Camiling Tarlac

Butuan City, Agusan del Norte

42°C

Dagupan City, Pangasinan

Bacnotan, La Union

Iba, Zambales

Daet, Camarines Norte

Virac (Synop), Catanduanes

CBSUA-Pili, Camarines Sur

Borongan, Eastern Samar

Maasin, Southern Leyte

Dipolog, Zamboanga del Norte

The heat index is the measure of the temperature that a person feels in contrast to the actual air temperature. Computed by factoring in the humidity and the air temperature, the heat index measures "human discomfort" and is the "apparent temperature" felt by the human body.

PAGASA's heat index classification defines heat index temperatures ranging from 42°C to 51°C as being in the "danger" level, where "heat cramps and heat exhaustion are likely; heat stroke is probable with continued exposure."

The Department of Health has advised individuals who have prolonged sun exposure to drink as much as 10 glasses of water daily, with the heat index reaching up to a dangerous 50°C in some areas in the country.

—Mariel Celine Serquiña/RF, GMA Integrated News