The Department of Transportation and Development has closed Interstate 10 from its junction with Interstate 49 in Lafayette east to the Iberville Parish line due to freezing rain, sleet and snow whipping throughout the area.
Traffic is being detoured via I-49 north to U.S. 190 at Opelousas.
How long that highway will be open eastward is matter of how long it will be before bridges and overpasses become too dangerous to travel.
Freezing rain and sleet had spread over most of Southwest and South Central Louisiana by 8 a.m., according to the National Weather Service.