Opinion of the Court
initiated the strike before Glacier’s trucks were full of wet concrete—say, by instructing drivers to refuse to load their trucks in the first place. Once the strike was underway, nine of the Union’s drivers abandoned their fully loaded trucks without telling anyone—which left the trucks on a path to destruction unless Glacier saw them in time to unload the concrete. Yet the Union did not take the simple step of alerting Glacier that these trucks had been returned. Nor, after the trucks were in the yard, did the Union direct its drivers to follow Glacier’s instructions to facilitate a safe transfer of equipment. To be clear, the “reasonable precautions” test does not mandate any one action in particular. But the Union’s failure to take even minimal precautions illustrates its failure to fulfill its duty.
Indeed, far from taking reasonable precautions to mitigate foreseeable danger to Glacier’s property, the Union executed the strike in a manner designed to compromise the safety of Glacier’s trucks and destroy its concrete. Such conduct is not “arguably protected” by the NLRA; on the contrary, it goes well beyond the NLRA’s protections. See NLRB v. Marshall Car Wheel & Foundry Co., 218 F. 2d 409, 411, 413 (CA5 1955) (strike unprotected when employees abandoned their posts without warning “when molten iron in the plant cupola was ready to be poured off,” even though “a lack of sufficient help to carry out the critical pouring operation might well have resulted in substantial property damage”).
Thus, accepting the complaint’s allegations as true, the Union did not take reasonable precautions to protect Glacier’s property from imminent danger resulting from the drivers’ sudden cessation of work. The state court thus erred in dismissing Glacier’s tort claims as preempted on the pleadings.
III
The Union resists this conclusion. First, it emphasizes
