Black Duck, Minnesota dipped to 20 degrees below zero earlier this week
NBC NATIONAL NEWS — Winter cold is gripping the Midwest, and the town of Black Duck, Minnesota is feeling the worst of it.
Temperatures dipped to -20 degrees on Thursday, with a wind chill of -40.
They're used to cold in Black Duck, but even this is extreme.
Schools were delayed two hours out of concern for the children's safety.