MANILA – A total of 29 areas across the Philippines are expected to experience extreme heat today, Saturday (26 Apr 2025), with the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) forecasting danger-level heat indices of up to 45°C.

According to PAGASA’s 5 a.m. bulletin, the highest heat index is expected in Muñoz, Nueva Ecija, where it may reach a sweltering 45°C. Heat index refers to what the temperature feels like to the human body when relative humidity is combined with the actual air temperature.

PAGASA warned that heat indices ranging from 42°C to 51°C pose health threats such as heat cramps, heat exhaustion, and even heat stroke with prolonged exposure or physical activity.

Areas with danger-level heat index:

Ilocos Region: Laoag (42°C), Batac (42°C), Dagupan City (43°C), Bacnotan (43°C)

Cagayan Valley: Aparri (42°C), Tuguegarao City (43°C), Echague (43°C)

Central Luzon & CALABARZON: Subic Bay (43°C), Camiling (42°C), Baler (42°C), Tayabas (42°C), Los Baños (42°C), Ambulong/Tanauan (43°C), Sangley Point (44°C)

MIMAROPA & Palawan: Coron (43°C), San Jose (44°C), Puerto Princesa (43°C), Cuyo (42°C)

Bicol Region: Daet (42°C), Legazpi City (43°C), Masbate City (42°C), Pili (43°C)

Western Visayas & Eastern Visayas: Roxas City (42°C), Iloilo City (43°C), Dumangas (42°C), Catarman (42°C)

Quezon Province: Infanta (43°C), Mulanay (42°C)

Rain Outlook

While Luzon and Visayas grapple with the heat, Mindanao is expected to receive scattered rain showers and thunderstorms due to the prevailing Intertropical Convergence Zone (ITCZ).

PAGASA also cautioned about potential flash floods and landslides in Mindanao, especially in areas hit by moderate to heavy rains.

In addition, easterly winds are bringing isolated rain showers and thunderstorms over Eastern Samar and Southern Leyte. The rest of the country will continue to experience generally fair weather with partly cloudy to cloudy skies.

Light to moderate winds with slight to moderate seas will persist across the Philippine archipelago.

ia/mnm