Metro Manila braces as PAGASA warns of 46°C heat index

Metro Manila residents are urged to take extra precautions as the heat index is expected to reach a dangerous 46°C on Monday, 3 March, prompting class suspensions in several municipalities.

PAGASA administrator Dr. Nataniel Servando addressed the extreme heat conditions in a radio interview , explaining that the country is transitioning from Amihan (northeast monsoon) to a hotter and more humid weather pattern.

“Inaasahan na natin ito dahil nasa transition na tayo from Amihan towards relatively warmer and humid weather conditions. (We expect this as we transition from Amihan to relatively warmer and more humid weather conditions),” he said.

Understanding the Heat Index

The heat index — or the apparent temperature felt by the human body — is a combination of air temperature and humidity. Higher humidity levels make it feel even hotter than the actual temperature. Servando explained that easterlies, which bring warm and humid air, are significantly contributing to the rise in the heat index.

PAGASA classifies a heat index of 42°C to 51°C as the "danger" level, where individuals are at risk of heat-related illnesses such as heat cramps, heat exhaustion, and even heat stroke with prolonged exposure.

Despite the alarming forecast for Metro Manila, Servando clarified that only a few areas in the country typically reach the danger level of the heat index.

“Kung titignan ang heat index observation at forecast, nasa 2-3 lugar lang sa buong Pilipinas ang umaabot sa danger level na heat index (Based on heat index observations and forecasts, only 2-3 areas in the Philippines usually reach the danger level),” he noted. 

With summer fast approaching, Servando confirmed that the Amihan season is expected to end by mid-March, ushering in consistently hot and humid weather.

Health Risks & Safety Reminders

As temperatures soar, the Department of Health (DOH) has issued warnings about heat-related illnesses, especially for children, the elderly, and those with pre-existing conditions.

Exposure to extreme heat can cause fatigue, dizziness, nausea, headaches, and dehydration. More severe cases can lead to heat stroke, which may cause loss of consciousness, confusion, or seizures, and can be fatal if untreated.

"Ang matagal na pagkakalantad sa init ay nagpapataas ng posibilidad ng heat stroke, isang seryosong kondisyon na may pagkawala ng malay, pagkalito, o kaya ay mga seizure/kombulsyon, na maaaring nakamamatay kung hindi ginagamot (Prolonged exposure to heat increases the risk of heat stroke, a serious condition that can lead to unconsciousness, confusion, or seizures, and can be fatal if untreated)," the DOH warned.

What to do in case of heat stroke

• Move the person to a cool, shaded, or air-conditioned area.

• Apply a cold compress to the head, neck, face, and body.

• If the person is conscious, encourage slow but frequent sips of cold water.

• Seek immediate medical attention by calling emergency services or going to the nearest hospital.

Authorities continue to monitor the extreme heat conditions and urge the public to stay hydrated, avoid prolonged sun exposure, and take necessary precautions to prevent heat-related illnesses.