The added staffing helps ensure a continuous presence on the water as the Coast Guard establishes safety zones around major events.
Mayor Cherelle Parker said the Streets Department is waiting for a salt shipment that remains stalled on the river.
Philadelphia police are warning residents to stay off frozen rivers and lakes after receiving about a dozen calls in recent days about people walking on the ice.
The Penn Environment and Research Policy Center has released a new report spotlighting sewage overflow in Philadelphia.
The events culminate with a fireworks show over the Delaware River Wednesday night, and a sendoff for the ships on Thursday.
Four Navy ships made their way to Philadelphia and Camden, New Jersey, up the Delaware River.