Modified service between Washington D.C. and New York City began this morning.
Service from New York to Boston is expected to resume just after 8:30 a.m. this morning.
Amtrak's Keystone service that runs to and from New York, Philadelphia and Harrisburg is also operating on a modified plan.
Amtrak said passengers with travel plans may adjust their plans or review refund information through Amtrak.com, smartphone apps or by calling 800-USA-Rail.
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