Two trains derail in SE New Mexico [in separate incidents] over the weekend

As reported by KRQE.

This area would see very large-scale rail shipment of irradiated nuclear fuel to the Holtec/Eddy-Lea Energy Alliance centralized interim storage facility, if approved by NRC for construction and operation. Beyond Nuclear, along with a broad environmental coalition, plans to legally intervene against the proposal by NRC's arbitrarily short Sept. 14 deadline.

Re: one of the derailments, the article reports:

The official cause has yet to be determined, but the Midway Fire Department believes the tracks simply gave out.

Each rail car of irradiated nuclear fuel will be very heavy, among the very heaviest loads on the rails. And each train could carry multiple cars of irradiated nuclear fuel.