More National Guardsmen were expected to help clear roads for fuel shipments, getting oxygen for residents in assisted living centers.

Prior to its reopening, the authority said in a post on X: "Consensus of our maintenance staff is that it's the worst we've ever seen on the bridge," in reference to the ice.

The Mackinac Bridge is closed to all traffic Tuesday due to hazardous ice falling from its cables and towers, according to the Mackinac Bridge Authority. The closure was announced just before 9 a.m. The bridge will reopen when conditions improve, but motorists should avoid the area in the meantime.