Hurricane Erin is causing dangerous rip currents and high surf at beaches along the East Coast, and some areas could see coastal flooding over the coming days. The flood risk increases Thursday, when high waves coincide with high tide along the Jersey Shore and New York's south-facing beaches.

"Environmental conditions appear marginally favorable for additional development over the next day or so while the system moves westward at around 15 mph and a short-lived tropical depression could f...