Before dawn on June 22, on the Robert Street bridge over the Mississippi River, some of the wheels on a Union Pacific train car came off the tracks. Two more cars partly derailed as the train neared a rail yard.
Later that day, near Barge Channel Road, wheels on two more cars slipped from the rails. One car contained chlorine.
There was no spill of the potentially lethal chemical. But the incident was a reminder that trains with hazardous materials — including crude oil, chlorine, sulfuric acid and anhydrous ammonia — roll across Minnesota.
"It's just a witches' brew of toxicity in terms of what's rumbling into our communities and our neighborhoods on a daily basis," said Rep. Frank Hornstein, DFL-Minneapolis.
Concern about the risks of trains carrying dangerous materials is growing after the Trump administration scrapped a proposed rule governing train safety, and action has slowed on others.
A proposed requirement that train engineers (and truck drivers) be screened for sleep apnea was withdrawn in August. Consideration of a plan to require two-person train crews has been delayed at least until next year.
Meanwhile, a request by six state attorneys general for rules requiring that crude oil be treated before transport to lower vapor pressure and make it less flammable has stalled.
Under President Donald Trump, federal agencies are "just not feeling any heat" to tighten standards, said Matt Krogh of Crude Awakening Network, a project of the environmental group Stand.earth. "There is no foreseeable end to the increasing risk."