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Heat index may reach up to 50°C in some parts of PH amid dry season.jpg

Heat index may reach up to 50°C in some parts of PH amid dry season —PAGASA

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The state weather bureau, PAGASA, announced on Thursday that some regions in the country may experience a heat index of up to 50 degrees Celsius (°C) during this year’s dry season.

"In our two-day outlook here in Metro Manila, we expect temperatures to possibly reach up to 41°C," said PAGASA's assistant weather services chief, Chris Perez, in an interview with Unang Balita.

"But in other parts of the country, we are not ruling out the possibility that the highest heat index during this dry season could range from 48°C to 50°C," he added.

Perez mentioned that the highest heat index is expected to be felt around April or May.

When asked about the possibility of heat waves during this dry season, Perez explained that a heat wave typically involves a two- to three-day increase in daytime temperatures by at least 0.5°C or more, which is common in mid-latitude regions with four seasons.

"Here in the Philippines, we are exposed to the sun's heat year-round. So, even with slight changes in daytime temperatures, we don’t immediately feel it. Therefore, it’s not something we would classify as a heat wave," he explained.

Perez also stated that the start of the dry season will bring hotter days, even at night.

On Wednesday, PAGASA officially declared the onset of the dry season with the termination of the Northeast Monsoon, or Amihan, over most of the country.

“The shift in wind direction from northeasterly to easterly due to the formation of the High-Pressure Area (HPA) over the Northwestern Pacific signifies the end of the Northeast Monsoon and the beginning of the dry season,” PAGASA explained.

However, the weather bureau noted that extreme Northern Luzon might still experience occasional northeasterly winds.

As a result, PAGASA warned that temperatures across the country will gradually warm up, though isolated thunderstorms are also likely.

The public was advised by PAGASA to take necessary precautions to prevent heat stress and to ensure efficient water use for personal and domestic purposes.

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