INDIANAPOLIS - Despite freezing temperatures and sub-zero wind chills Tuesday morning, Indianapolis Public Schools decided to keep its students on a regular schedule.

More than 160 schools surrounding IPS were on a 2-hour delay to ensure buses, which run on diesel engines, are running properly.

Many parents of IPS students fired off on Facebook and Twitter about the regular schedule, citing that it was too cold for students.

"Why does IPS make these kids stand outside in this (cold)?" RTV6 Facebook fan Edward Grimm wrote.

IPS Spokesman John Althardt said the district decided to stay on a regular schedule because many of their students depend on school breakfast programs.

"We look at several districts. Several of our students depend on breakfast and lunch. We have our buses warming up right now," he said. "We want to make sure that students are dressed warmly and appropriately."

Althardt said IPS is confident that parents will bundle their students up in warm layers.