Two people were injured in a secondary crash on North Dakota's Interstate 29 during Thursday's blizzard. Authorities warn drivers to slow down.

Strong and destructive winds, equivalent to those of a severe thunderstorm, caused damage and power outages in western South Dakota overnight.

Freezing rain overnight has already created issues on South Dakota roadways, including the Pierre, Philip, Onida, and Blunt highways, as well as in surrounding communities.