By Rebecca Sheir
Another sweltering day is expected in the D.C. area, and Metro reports the steamy temperatures could affect Metrorail service.
Metro says high temperatures sometimes cause "heat kinks" on the rails: that means the overheated tracks expand, so Metro needs to slow train speeds to ensure safety.
A kink on the Red Line has resulted in speed restrictions through a stretch of track between the New York Avenue/Florida Avenue and Rhode Island/Brentwood Metrorail stations.
Metro says if track inspectors discover further heat kinks, the transit agency will need to slow train speeds through the area.
Metro warns the record-breaking heat also may make rail stations and trains uncomfortable for passengers. While Metrorail cars are air-conditioned, stations are not, contrary to popular belief.