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

Over the weekend, Erin is expected to rapidly intensify all the way to a Category 3 hurricane. By Monday, as the storm steers away from the Caribbean and toward Bermuda, it's now forecast to hit Category 4 with 130 mph sustained winds. Some long-term computer models suggest it could get even stronger and hit Category 5 in the open ocean.

Erin is expected to become a hurricane Friday, Aug. 15 and a major hurricane by Sunday morning. What Florida can expect from the storm.