The heat of summer forced the closure of Michigan’s largest city on Thursday and Friday and shortened class days in Detroit.
Southern Lower Peninsula is expected to experience temperatures as high as 90 degrees.
Leadriane Robert, Superintendent in Grand Rapids, said: “This not only creates a challenging learning environment, but also raises safety concerns.”
There are some Grand Rapids schools that do not have air conditioning. About 13,750 students attend the school.
The school day in Detroit was cut back by three hours on Thursday and Friday due to heat. The district is home to approximately 48,000 students.