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 Metro spokeswoman said an earlier power issue delayed trains from leaving the Glenmont station rail yard.
MARC and Amtrak trains in the Washington area are suspended Tuesday morning because of downed wires, according to alerts.
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.