"It appears that we have dodged a bullet," Pennsylvania Gov. Edward Rendell told CNN.
Thankful it wasn't worse, officials expected millions of dollars in damage and a massive cleanup.
High waters also struck other areas, including Maryland, the District of Columbia, New Jersey and Virginia.
The swollen Delaware River in Pennsylvania crested Thursday and the river level was falling on the Susquehanna.
An evacuation order covering about 200,000 people was lifted for Wilkes-Barre, Pa. Some 6,200 people were reported evacuated along the Delaware River in New Jersey and 15,000 in Binghamton, N.Y.