Tropical Storm Erin is approaching Puerto Rico and the Virgin Islands, bringing heavy rains that could cause flooding and landslides

Tropical Storm Erin is still moving quickly westward and is forecast to become a hurricane in a few days over the central tropical Atlantic, the NHC said.

Implications for the Leeward Islands: Residents and visitors in St. Thomas, St. John, St. Croix, Puerto Rico and the northern Leeward Islands should monitor this system throughout the week. Even if the wave remains weak, increased moisture could bring showers, gusty winds and higher seas toward the end of the week.

While Erin won't hit the U.S. directly, the storm's biggest impact on the East Coast will be along the Outer Banks of North Carolina, where coastal flood watches, tropical storm watches and storm surge watches are in effect. The storm surge could be as high as 4 feet.

Tropical Storm Erin making its way across the Atlantic Ocean. What to consider for your Myrtle Beach vacation. August, September and October are the most active months of hurricane season.