The National Weather Service says the tornado struck the Massachusetts resort area just after noon Tuesday. It ripped off a hotel roof, toppled trees and knocked out power to thousands during the peak of tourist season.
There were no reports of injuries.
Utilities in New Jersey say around 212,000 homes and businesses didn't have electricity Tuesday morning. Crews in Michigan were working to reconnect about 100,000 customers who still didn't have power.
Videos posted on social media Monday night showed flooding deep enough to float cars in parts of New York City.
Flooding canceled flights through Tuesday afternoon at the Tweed-New Haven Airport in Connecticut, and a lightning strike set a dorm at private school Choate Rosemary Hall on fire.
Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.