WASHINGTON — Metro says high temperatures have forced it to limits the speeds of aboveground trains to 35 mph.
Officials issued the order Monday afternoon, as temperatures soared into the mid-90s. The agency says system-wide delays were possible.
The Washington Post reports that excessive temperatures can cause heat kinks, in which steels rails expand and possibly buckle, creating a risk for derailment.
Follow CBS D.C. on Twitter
(© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)