Hanoi (VNA) – The heat index (HI) in nineareas of the Philippines was at “dangerous” level on April 15, according to the Philippine Atmospheric, Geophysical andAstronomical Services Administration (PAGASA).

The agency forecast that the harsh weather may last untilMay due to the impact of the El Nino phenomenon coinciding with the dry seasonin this Southeast Asian country.

PAGASA predicted that an HI at 43 degrees Celsius - adangerous level - may occur in four locations, including Dagupan city(Pangasinan province), Aparri and Tuguegarao cities (Cagayan province) andAborlan municipality (Palawan province). An HI at 42 degrees Celsius may occur in five other areas, including Echague (Isabela province), PuertoPrincesa (Palawan), Roxas (Capiz), and Zamboanga and Cotabato cities.

Meanwhile, the HI, which indicates what the temperature feels like to the human body when relative humidity is factored in with the air temperature, is forecast to rangefrom 39-40 degrees Celsius in Manila capital.

PAGASA said the "dangerous" HI isbetween 42 - 51 degrees Celsius, which can cause cramps, heat exhaustion, and even heat stroke. Meanwhile, the "extremelydangerous" HI level of 52 degrees Celsius or higher can causeimmediate heat shock.

In light of these conditions, PAGASA advises the public tolimit outdoor activities, especially during the noon hours, and stay hydratedby drinking plenty of water. Additionally, individuals venturing outdoors areurged to utilise umbrellas, hats, and clothing with sleeves for sun protection.

Earlier this month, Philippine education officials said thathundreds of schools in the country, including many in Manila, hadto switch to online learning to ensure students' health due to hotweather./.