As Tropical Storm Ernesto churns through the Atlantic Ocean, residents of the Virgin Islands and Puerto Rico are bracing for its impending arrival. The storm, which is rapidly gaining strength, is predicted to make landfall near or over the Virgin Islands and Puerto Rico this evening, potentially escalating into a hurricane as it passes northeast of Puerto Rico during the night.

According to the National Hurricane Center's latest update at 5 p.m. ET, Ernesto has intensified with maximum sustained winds now at 60 mph and moving at a speed of 18 mph. The storm system is anticipated to reach the U.S. and British Virgin Islands by this evening and pass close to Puerto Rico, Vieques, and Culebra overnight on Tuesday and Wednesday.

A hurricane watch has been issued for the U.S. and British Virgin Islands, including Vieques and Culebra. Additionally, a tropical storm warning remains in effect for St. Kitts, Nevis, Montserrat, Anguilla, St. Martin, St. Barthelemy, Sint Maarten, the U.S. and British Virgin Islands, Puerto Rico, Vieques, and Culebra.

Forecasters predict that Ernesto will continue to strengthen and transition into a hurricane by late Tuesday or early Wednesday. The storm system poses a significant threat with potential rainfall accumulations of 4 to 6 inches over the Leeward and Virgin Islands and 3 to 6 inches, with maximum amounts of 10 inches, across Puerto Rico. These heavy rains could lead to considerable flash flooding and mudslides in the Leeward Islands.

Storm surge levels are also expected to rise, with a potential increase of up to 3 feet, accompanied by large and destructive waves. The National Hurricane Center urges caution and preparedness for these potentially hazardous conditions.

CBS News senior weather producer David Parkinson emphasized that rainfall will be a significant factor with Ernesto, surpassing wind concerns. He mentioned that some models suggest a possibility of up to a foot of rainfall in certain areas due to the topography, with higher totals not entirely ruled out.

The rippling effects of Ernesto may also impact the eastern seaboard, with increased rip currents and larger waves posing concerns for coastal areas.

Ernesto marks the fifth named storm of the Atlantic hurricane season, which has already been noteworthy due to Beryl's record-breaking strength early in the season. The season's forecast by NOAA predicts an above-normal number of storms, with 17-25 named storms, eight to 13 hurricanes, and four to seven major hurricanes.

Interestingly, the fifth-named storm typically emerges around August 22, according to NOAA's historical data. However, Ernesto has made an early appearance, underscoring the importance of preparedness and vigilance during this active hurricane season.

As Ernesto approaches, authorities urge residents of the affected regions to stay informed and follow safety guidelines provided by local authorities.