As the calendar changes to October, Ohio's largest school district, Columbus City Schools, announced late Monday that all of the district's schools will be closed on Tuesday due to extreme heat.

According to the National Weather Service, the high in Columbus is expected to reach 94 degrees. The record for the hottest day ever recorded in October in Columbus is 91, set back in 2007.

Nearly one third of Columbus' school buildings lack air conditioning.

Other Midwest cities could reach record highs on Tuesday. The forecast for Tuesday in Indianapolis is 91, which would match the hottest October day there on record. The forecast for Cincinnati is 96, which would shatter the previous record high for the month of October by 5 degrees. A high of 90 would mark the third-hottest October day on record in Pittsburgh.

Cleveland could have its first October day ever above 90 on Tuesday.

Tuesday's Midwest heatwave comes just days after parts of Montana had more than 3 feet of snow.