There was no respite from the heat as the computed heat index values in Ambulong, Batangas and Sangley Point, Cavite reached 50 degrees Celsius (°C) on Monday afternoon, May 31.
Based on the monitoring of the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), 20 stations registered heat index values within the "danger" level due to the high likelihood of heat cramps and heat exhaustion.
The top 20 stations with high heat index values on Monday were:
Ambulong, Batangas (50°C, 2 p.m.)
Sangley Point, Cavite (50°C, 2 p.m.)
Legazpi City, Albay (47°C, 2 p.m.)
Casiguran, Aurora (46°C, 2 p.m.)
Dagupan City, Pangasinan (46°C, 11 a.m.)
Clark Airport, Pampanga (45°C, 2 p.m.)
Ninoy Aquino International Airport (45°C, 2 p.m.)
Aparri, Cagayan (44°C, 11 a.m.)
Coron, Palawan (43°C, 2 p.m.)
Infanta, Quezon (43°C, 2 p.m.)
Laoag City, Ilocos Norte (43°C, 2 p.m.)
Masbate City, Masbate (43°C, 2 p.m.)
Roxas City, Capiz (43°C, 2 p.m.)
Tuguegarao City, Cagayan (43°C, 2 p.m.)
Cubi Pt., Subic Bay, Olongapo City (42°C, 2 p.m.)
Port Area, Manila (42°C, 2 p.m.)
Puerto Princesa City, Palawan (41°C, 2 p.m.)
San Jose, Occidental Mindoro (41°C, 2 p.m.)
Science Garden, Quezon City (41°C, 2 p.m.)
Sinait, Ilocos Sur (41°C, 2 p.m.)
The highest heat index so far in 2021 was recorded in Dagupan City, Pangasinan on May 14 at 53℃.
In the next 24 hours, PAGASA said Mindanao, Central Visayas, and Eastern Visayas will have cloudy skies with scattered rain showers and thunderstorms due to tropical storm "Dante."
Meanwhile, Metro Manila and the rest of the country will continue to experience warm weather with isolated afternoon or evening rain showers.
In a virtual press briefing on Monday, May 31, PAGASA-Climate Monitoring and Prediction Section chief Ana Liza Solis said warm temperatures may still persist due to the absence of widespread rains, especially in Luzon.
She said there are only isolated thunderstorm activities in the afternoon or evening.
"May maiinit pa na temperatura habang hindi pa nagpeprevail ang rainy season associated with the southwest monsoon o 'habagat' (warm temperatures will still prevail while the rainy season associated with the southwest monsoon or 'habagat' is not yet the prevailing winds in the country)," Solis said.
"Pero may nakikita pa ring monsoon breaks na posibleng maranasan pa rin ang maiinit na temperatura sa June (But there are still monsoon breaks where we can still experience warm temperatures in June)," she added.