AURORA, Colo. -- Double-digit below zero temperatures are again causing school districts to cancel classes on Wednesday.

As of 4 p.m. Tuesday, Adams 14, Adams 50, Aurora, Boulder Valley, Cherry Creek, Douglas County and Jefferson County were the larger school districts already canceling classes, but not because the roads are bad or a lack of running buses.

"Right now, our chief concern are the dangerously temperatures in the morning," said Cherry Creek School District spokeswoman Tustin Amole. "We have some high school kids who would normally be waiting for a bus at 6:30 in the morning; other kids who will be walking."

Even though students and teachers had the day off because of the weather, mechanics at school district bus barns were hard at work making sure the buses could start if needed.

"The mechanics are going around starting the buses in batches, running them and making sure that everything's OK," said Amole.

At the Cherry Creek Schools bus barn on Smoky Hill Road, mechanics were making sure the buses were plugged into engine block heaters to keep it warm under the hood. A few buses had to be jumped because of dead batteries, one reason the mechanics don't also get an off day.

"It's really about protecting the buses and insuring that they can run if we need them to," said Amole.

Near Cherry Creek High School, 7NEWS found students using their day off to sled and snowboard on a neighborhood hill.

"I'm wearing so many layers, it's different because you don't wear that to school," said sophomore Kyle Jankowski. "My face is cold, but that's pretty much it. I can't talk it's so cold."

Jankowski admitted he saw the irony in spending three hours outside snowboarding when school was canceled to keep students from having to be outside.

"I go to Creek, so you have to walk outside to every class," said Jankowski. "I have to personally walk to school, it's just awful."

"Do you put any more weight on people who have to walk to school versus people who are waiting for bus stops, on the temperature?" asked Zelinger.

"If a kid has to go outside to get to school it has equal weight for us," said Amole. "It's unusual for us to have temperatures this cold in Colorado and so it's rare that we make a decision based on the temperatures."

For districts that cancel classes on Wednesday, mechanics will still show up to work to prep the buses once again to make sure they start when they're needed Thursday morning.