Vacationers and residents prepared to evacuate North Carolina coastal areas on Thursday morning as Hurricane Irene roared toward the United States, where it’s expected to hit this weekend. The powerful Category 3 storm, now battering the Bahamas with sustained winds of 115 mph, is forecast to pound much of the eastern United States starting early Saturday. Janeen Wall bolted before the storm, leaving less than a day after arriving at her Carolina Beach, North Carolina, accommodations.