MINNEAPOLIS (AP)  -- The Minneapolis and St. Paul public school districts canceled classes for a second consecutive day Tuesday as Minnesota deals with subzero temperatures and the aftermath of a snow storm.

St. Paul Public Schools Superintendent Valeria Silva says "logistical challenges" are still a factor in getting the children to school. Many school bus routes remaining partially blocked. Also, wind chills are dangerously cold and having students standing outside for buses that could be delayed isn't safe.

Minneapolis Public Schools have similar concerns. The frigid cold and students trying to get to school over large piles of snow in the street, as well as school bus travel problems across the city.

The cancelations include all school activities.

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