SIOUX FALLS, S.D. (KELO) -- High winds are causing issues for semi-truck drivers in South Dakota. The South Highway Patrol says that multiple semis have been blown off the interstate. 2 dead after drowning in Walworth County The highway patrol posted a picture on X of a semi that had been blown off the road 1 mile north of the Sisseton exit on I-29. The highway patrol is recommending that high-profile vehicles should wait to travel until the winds die down.