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The weather agency's latest heat index bulletin said the 13 areas will be under the “danger” classification, with temperatures ranging from 42°C to 45°C.

“Danger” heat index is expected in nine areas today amid the ongoing El Niño and dry season, according to the Philippine Atmospheric, Geophysical and Astronomical Services Administration.

Nine areas in the Philippines are expected to experience scorching temperatures of up to 45°Celsius (°C) on Saturday, state weather bureau PAGASA reported.

The Asian Development Bank has trimmed its growth forecast for the Philippines for this year, citing risks posed by extreme weather events that can drive up inflation and the slower growth in advanced economies.

The warm or dry season has officially begun, the Philippine Atmospheric, Geophysical and Astronomical Services Administration declared in the last week of March.