Rotorua Girls' High School principal Ally Gibbons says students sent home this week because of flood damage to the school's boiler are still expected to work.
The school has been forced to close its doors this week after Wednesday's flash flood damaged the school's boiler, meaning classrooms were left without heating.
Ministry of Education rules stipulate classrooms must be a certain temperature. The Health and Safety Code requires classrooms, lecture rooms, laboratories, typing and sewing rooms and auditoriums to be 18C. Woodwork and metalwork rooms must be 16C. Gymnasiums must be 12C to 14C.
Mrs Gibbons said the school had to send students home on Wednesday because of the heating issues as well as surface flooding.
"There was water everywhere, they couldn't even get from one classroom to the other."