This just in from Amtrak:
Passage of severe weather has lead to the temporary closure of the Keystone Service route between Harrisburg and Philadelphia. Several large trees have fallen onto the tracks and have also damaged the overhead electrical system that powers the trains.
No through service on Keystone trains is anticipated until this afternoon. Keystone Service between Philadelphia and New York City will continue to operate, as will the Pennsylvanian (Trains 42 & 43) between Pittsburgh and New York City.
Septa is experiencing delays, too–the Paoli/Thorndale line is suspended until further notice due to overhead wire problems.
See this earlier post for flooding information, including the evacuation of Wilkes-Barre.