Downed wires in Maryland have been repaired and full Amtrak service has been restored.

Crew works to repair downed wires along Amtrak tracks near Trenton (@Amtrak_NEC via Twitter)

Travelers between Philadelphia and Washington on Amtrak's Northeast Regional and Acela Express were subject to "significant delay" as falled overhead wires in Perryville, Maryland were repaired..

Amtrak in an email press release says that residual delays can be expected.