As of Saturday morning, Hurricane Erin had strengthened into a Category 4 storm -- but is on the cusp of becoming a Category 5 storm -- with maximum sustained winds of up to 155 mph, the National Hurricane Center said. The hurricane is forecast to become a Category 5 storm later on Saturday.

The National Hurricane Center is tracking two systems in the Atlantic basin, including Invest 98L, which could become a tropical depression before moving onshore in either Mexico or southern Texas.