Sections of Interstate 95 collapsed into the Turtle River, flood waters swept over Brunswick streets and fierce winds reduced homes on St. Simons Island to splinters. Hurricane Claire, the fictitious Atlantic storm selected for a practice exercise Thursday by emergency responders, barreled ashore as a bruising Category 4 hurricane before dawn Saturday at the county line between Glynn and Camden, bringing devastation not witnessed in this area since the deadly storm of 1898. Claire’s fury raged throughout day and into Saturday night, riding in on a high tide to wreak untold havoc and threaten the lives of thousands.