Raya Salter remembers the yells as a child when she asked her mother to turn up the heat in the winter: “Put on a sweater. Put on two sweaters. Here’s an extra blanket. That’s gonna make it work because the heat is not going up.

U.S. tariffs on steel and aluminum imports are poised to escalate costs for the oilfield service companies behind North America's vast energy industry, as their operations rely heavily on these metals.