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The temperature reached 40 degrees Celsius in Isabela on Monday, the hottest in the country so far this year, according to the Philippine Atmospheric, Geophysical and Astronomical Services Administration.

At least 13 areas in the Philippines could experience a “danger” heat index of 44 degrees Celsius today amid the continued effects of El Niño and the dry season, according to the state weather bureau.

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.