A California school district that had to cancel hundreds of classes and send students home because of high temperatures this summer is facing another shutdown next week.

The Sacramento Unified School District (SUSD) announced Thursday that it would have to cancel classes, with most classes in session by Thursday afternoon.

The school district said its students will likely miss work or school, with about 70 percent of students and their families in the district’s affected area being able to resume school on Friday.SUSA is a school district in Southern California, and has about 3,700 students.

The district has received reports of high temperature and humidity levels throughout the day and is working to contain those conditions, according to the district.

The district said that all classes would begin at 8:30 a.m.

ET and end at 8 p.m., and that it had to work with its staff to get all students home safely.