A powerful nor’easter has intensified, generating storm-force winds and massive waves along the East Coast. Millions are under warnings, with dangerous conditions expected through the weekend. The National Weather Service warns of flooding along the Mid-Atlantic coast, especially near New Jersey and Delaware. Wind gusts could reach 65 mph on Cape Cod, Massachusetts, and nearby islands. The storm has already led to concert cancellations and changes to the Red Sox schedule. Ferry services to Nantucket and Martha’s Vineyard are disrupted. Residents are bracing for power outages and debris as the storm approaches.