MINNEAPOLIS (WCCO) — As the temperatures rise in the wake of the polar vortex, life is getting back to normal across Minnesota and western Wisconsin.

Schools across the state will welcome back students Friday morning after hundreds of districts canceled classes for up to four consecutive days this week due to snow and extreme arctic cold.

READ MORE: Twins, Lynx, And Gophers Take Home Weekend Wins

On Friday, there were only about a dozen late starts. Morris Area Schools will be closed because of boiler problems at the high school.

RELATED: School Closings

READ MORE: St. Paul Police Report Rapid Increase Of Overdoses, Warn Of Synthetic Opioids

During the cold snap, bus services, such as Monarch Bus Service in the Twin Cities, have been starting buses every few hours to make sure they keep running smoothly. Many fleets use diesel fuel, which gels up in the cold.

Drivers with Monarch also did test runs of their routes before picking up hundreds of kids in Minneapolis and St. Paul on Friday.

Gov. Tim Walz says local districts won’t be penalized for keeping their students safe.

MORE NEWS: 'It Was Just Nuts': Severe Storms Leave Residents With Damage, Debris, And Outages

Walz, a former educator, expects the schools will reach their requirements without having to add more days.