Oregon Gov. Kate Brown (D) recited a litany of climate-change plagues in her state-of-the-state speech Jan. 14 and said she intends to sign a cap-and-trade program into law.

“It is extremely painful to watch the effects of climate change on our communities,” Brown told the joint session of the Legislature.

“The Rogue Valley was covered in smoke for over eight weeks last summer,” she said. “Ninety percent of our state is in drought. And last year was the warmest...