SAVE the Children Philippines called for the government to address climate change, as heat waves surpassed 42 degrees Celsius in five places this week, resulting in the suspension of hundreds of classes across the country.

It said children's bodies were still developing and were not as capable of regulating internal body temperature as adults, making them more susceptible to heat-related illnesses, asthma, allergies, cardiovascular disease and respiratory problems.

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) blamed El Niño for recent heat waves. High temperatures would be particularly uncomfortable in Western Visayas and Negros Island.

"Educators and local authorities have been forced to take the extreme decision to shut hundreds of schools because this extreme heat means children are simply unable to concentrate in the classroom, and their health is also at risk. We need to see urgent action now to limit warming to a maximum of 1.5 degrees above preindustrial levels. Failing to do this will have dramatic consequences for children's health, safety and well-being," Save the Children Philippines Chief Executive Officer Alberto Muyot said.

Climate change has been raising global temperatures and causing unprecedented heat waves all around the world with more countries experiencing hotter days more frequently.

According to some teachers, the oppressive temperature in the classroom was bad for students' health, focus and the entire learning experience.

"We encourage everyone at school to protect the health of both the students and the staff during this hot season. We highly urge water breaks in each lesson to keep children hydrated, keep the room well-ventilated, and avoid afternoon classes. We schedule modular lessons whenever possible, especially during peak heat waves," Teacher Nur of Cotabato City said.