From Delaware to Florida, coastal flood alerts have been issued along a large portion of the U.S. East Coast. These are issued for 1-2 feet of inundation, and there are a few factors that are playing a role. A strong high-pressure center over New England and a stationary boundary offshore the southeast coast are going to leave the east coast under persistent onshore winds that are pushing the ocean water onshore.
Additionally, beachgoers should use caution due to high rip current risk. These strong, fast-moving currents can pull swimmers away from shore.
With the last full moon, just earlier this week. The high tides are usually enhanced, so this is an additional factor to the widespread coastal alerts.