Erin, the first hurricane of the season, is now forecast to become a Category 4 by Sunday. Here's where it could head in the week ahead.

At 11 a.m., the center of Hurricane Erin was located about 235 miles east-northeast of San Juan, Puerto Rico, traveling west at 17 mph. Forecasters said Erin is undergoing rapid intensification and is expected to strengthen further in the coming hours.

Hurricane Erin will continue to strengthen as it approaches the Leeward Island and Puerto Rico, where it will threaten with tropical downpours, pounding surf and strong winds.

Weather experts on the Leeward Islands, including Puerto Rico, are keeping close watch as Erin lurches toward the Caribbean and is on track to become a major hurricane.

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.

Tropical Storm Erin is expected to become a hurricane early on Aug. 15 and a major hurricane Aug. 17: What does that mean for?

Officials in the northern Caribbean warned Thursday of heavy rain and dangerous swells as Tropical Storm Erin approached the region. The storm is expected to remain over open waters and move north-northeast of islands including Antigua and Barbuda,

Erin has become the first hurricane of the 2025 Atlantic season as it heads west toward the Leeward Islands and the Caribbean. It's expected to strengthen.