The bitter cold that has gripped the Eastern U.S. is showing no sign of letting up before the weekend as records for low temperatures were broken Friday.

The National Weather Service says the newest band of Arctic air could plunge parts of the Southeast and Mid-Atlantic into deep freezes that haven’t been felt since the mid-1990s.

Temperatures and wind chills on Thursday dipped near zero or below in the Midwest, Northeast and even the South — where people are unaccustomed to the weather-related road hazards, school cancellations, and runs on supplies.

The cold snap followed snow and ice storms earlier in the week. The low temperatures caused much freezing and refreezing of snow, ice and roads. Weather forecasters warn that more sleet and freezing rain will be possible in the coming days.