As temperatures soar in the D.C. area, trains are moving more slowly.
Metro, MARC and VRE trains were all operating with speed restrictions on Tuesday because of sweltering heat.
Metro limited above-ground train speeds to 35 mph across the system as rail temperatures topped 135°, the agency said. The extreme heat can make the rails expand.
We've got the news you need to know to start your day. Sign up for the First & 4Most morning newsletter — delivered to your inbox daily. >Sign up here.
Rails outside the Crystal City Metro station bent on Monday because of the heat. It’s known as a heat kink. The problem, which made the tracks look wavy, was corrected. Metro says it’s happening more often this year because of the extreme heat.
Metro is performing enhanced inspections on tracks.
Stay with NBC Washington for more details on this developing story.
News4 sends breaking news stories by email. Go here to sign up to get breaking news alerts in your inbox.