A VA American Water spokeswoman said crews are working to repair a 100-year-old main that broke in the 4600 block of King Street at 3 a.m.
A spokesman said a smoldering crosstie caused delays.
MARC and Amtrak trains in the Washington area are suspended Tuesday morning because a train struck a pole at 1:50 a.m.
Forget bike lanes and bus lanes. In one city in China, they've moved on to "smartphone lanes" for walkers.
Trains were stopped at Rosslyn earlier tonight due to a switch problem.
The president will attend a Democratic Senatorial Campaign Committee event.
Trains are no longer delayed because of an earlier disabled train and train malfunction.