The Brief A pair of unrelated multi-vehicle crashes, which led to two semi-truck fires, shut down I-94 in Racine County on Thursday. The second crash and semi fire happened on I-94 near County Highway KR. A pair of unrelated multi-vehicle crashes, which led to two semi-truck fires, shut down I-94 in Racine County on Thursday morning, July 23. Racine County sheriff's deputies and Wisconsin state troopers shut down the interstate, and the Wisconsin Department of Natural Resources responded to the fuel spill. Crash near CTH-KRWhat we know:Several miles south of the initial crash site, near County Highway KR, a second multi-vehicle crash involving semis happened at around 7:30 a.m.