16 areas to experience extreme heat on Sunday with heat index up to 44C

Easterlies are expected to bring isolated rain showers across the Philippines, while a frontal system will affect Batanes and Babuyan Islands with scattered rains and thunderstorms.

PAGASA warns of possible flash floods or landslides in Metro Manila and the rest of the country due to severe thunderstorms brought by the easterlies.

Sixteen areas across the Philippines are expected to experience extreme heat on Sunday, May 11, with forecast heat index values ranging from 42°C to 44°C.

Tugegarao City, Cagayan and Tayabas City, Quezon are projected to have the highest heat index at 44°C.

Other areas like Bacnotan, La Union; Butuan City, Agusan del Norte; Coron, Palawan; Cuyo, Palawan; Dumangas, Iloilo; Iba, Zambales; ISU Echague, Isabela; Laoag City, Ilocos Norte; San Jose, Occidental Mindoro; Sangley Point, Cavite are forecast to have a 43°C heat index.

Several other locations will experience a 42°C heat index, including Alabat, Quezon; Ambulong, Tanauan Batangas; Aparri, Cagayan; Cubi Point, Subic Bay Olongapo City; Dagupan City, Pangasinan; Iloilo City, Iloilo; Infanta, Quezon; Masbate City, Masbate; MMSU, Batac, Ilocos Norte; Roxas City, Capiz; San Ildefonso, Bulacan; and Tacloban City, Leyte.

Under the danger level, heat cramps and heat exhaustion are likely, and heatstroke is probable with continued exposure.