Elementary school students in the region felt the heat this past week, as classrooms reopened for the new school year.

Old buildings and a lack of air conditioning in many schools means that students are learning in classrooms that are often as hot as 30 C before the students even go in.

"If you're on the second or third floor of a 70 or 80-year-old building, it's going to be very hot," Krista Wylie, co-founder of the advocacy group "Fix Our Schools" told Craig Norris on The Morning Edition.

Schools got so hot that one Kitchener parent told The Morning Edition she had to remove her child from school in the middle of the day.

"He was pretty red in the face, and his hair was all wet and sweaty," she said. "He was too hot and he couldn't think so I signed him out and took him home with me."

According to a release by Elementary Teachers' Federation of Ontario, high temperatures can take a toll on both students and teachers, and lead to negative health impacts.

No temperature laws

One of the major issues is that there are no laws outlining the maximum temperature under which a school can run. This means that schools can remain open no matter how hot it gets. 

"There should be very clear laws and legislation that prevent this from happening," said Sam Hammond, President of the Elementary Teachers' Federation of Ontario.

The ETFO also wants the Ontario government to invest in infrastructure in elementary schools to provide a safe working and learning environment for both staff and students.